Fix broken usage of sops with yamld

Using the `.yamld` suffix won't work because sops considers it a
plaintext file instead of a yaml file with meaningful content.

.sops.yaml

 creation_rules:
-  - path_regex: clusters/okd4/.*.yamld?
+  - path_regex: clusters/okd4/.*.yaml
     encrypted_regex: ^(data|stringData)$
     pgp: >-
       9D02A9AD73EF7F3D5F657AC2B392F6EB325E8C50,

clusters/okd4/hedgedoc-demo/secret.yaml

-data: ENC[AES256_GCM,data:W2ngrpai41xi8OdrXZmHQz3j+e3NdB9u+nr93VWpXisqyxmwfVOzDt9GOPars5/0yCcsQlcVkCQ2QV8OHjphGja230R2+52A7vTqxzgkut6hd9lnDaqNF5AUGjRo7Tn/VPPy/1CoUPqNTpvUx+YlPHj66ZwRnbr8Qxn+P7IQEg==,iv:VnPm2/Yl5CZ2pVhC6BpUyFaMvNsinhkpo6zk/VVzSww=,tag:SbE9H/88GES8G5ayYwta1A==,type:str]
+apiVersion: v1
+data:
+    test: ENC[AES256_GCM,data:mjgRvNcaV+w=,iv:tx10sMWQKDJ3fDU14iiALyc3XVKNpI4/nu+dibHKoxg=,tag:dkvwKHvh1eHGPH6IfoUGWQ==,type:str]
+kind: Secret
+metadata:
+    creationTimestamp: null
+    name: test
+    namespace: hedgedoc-demo
 sops:
     kms: []
     gcp_kms: []
     azure_kv: []
     hc_vault: []
     age: []
-    lastmodified: "2021-08-13T19:26:28Z"
-    mac: ENC[AES256_GCM,data:4wOq6qu3G3oVoxYRy+GkRI148UoZR6NFz9O3UNfHTwesn2AEA8cTkJCQgzW9DRuw9lfE/qDuGUsAQlt8fB8aALdn8NpjicVGD7aWm8j2ibzbcv1ApEhq3knKlBI/rhbw83QqKQaFov0bpAN4JnX+fuKnt5VDxnkKOo8iLyaeAaU=,iv:0lWF2cdUK6B23p3usHPb5YvaMvLOALGTDRaTQaRV3aM=,tag:x0bn35hFPgFabaUszwiAbw==,type:str]
+    lastmodified: "2021-08-13T19:35:09Z"
+    mac: ENC[AES256_GCM,data:z2l4rb+/JXXjd509lDvxi8+SGb01mFj42DOxBxXmLKDRi3otrlDy/0Z7QGz+AYqJ+/MlEc5RpvQSvUSggKKKZIiZFJ0Jx+ZCiO2WuiYt3YfIaoL1p2ZSdMhH86xVnhxHSWEWQ144WGglQNGKVoUYEx1W7qk9BdnvT7iP7IQwuh4=,iv:YkQLI+ULTbFqQL4YH7B7dggP74dvL+hDOeV8E+Pw0m0=,tag:K5Y0mmcdLTynbYXxJ6gk4w==,type:str]
     pgp:
-        - created_at: "2021-08-13T19:23:57Z"
+        - created_at: "2021-08-13T19:35:08Z"
           enc: |
             -----BEGIN PGP MESSAGE-----
 
-            hQIMA1u//sli4/n1AQ//f2hoJkh/932AKNHlYJAgbPe4T8oJ2Eyxdpiqu+m22iD8
-            e5IcfXH5Jz7hk8bwP6JHnYO56yFn+kxDHV2oph7eDaWOyRhp8XNRZb7KOJg2qRZB
-            oyECPRvwr1NKAwr2RfvRH1ioNbWQ4UJNomf7OEL+F4Hug8UeNakss7ubO7o8d09y
-            0GFk+PNDbYSCa9RdidW4hozWRcXO8T8QUX1nv7itDxRmg+xYIiXmywPPfCm8Xb1w
-            c7gglAR7CBP2tJKD1LT0ifHgzruKC7M7ecv+2bVihzPIAtCFYBuaNMmxCQiZddQE
-            eoTuhxPuBs1pUDW317TjDBGl4VlDc1+Kpe266HRbgQoC/IMe8pih+O1nldap7EYy
-            laBUHgbZF3mR9iqIVmG86mICpHJ9E4lkMEDz0e8XKvVJNOqK1qgc6FH8R+Oh8Nml
-            7nVaa2meRlZzcuo684to6aaCyu8JKmcsSAi5Sb68THIDxijDyOfPdXbu3fKqQW26
-            XNgWb52sqMt+ddMiVY6NgOReat8OeoYrlmLjofJyFOWcGdIDfJZ4lrhkfNUtbokA
-            ApJP4SJW9PO0B4xWPvWY0awHSs2Qs4pTU0wZA7fASM6RV2lMXBxXkPb5Tx57B3n8
-            xz/8ruU3SNeCKH+2DUegtl3h3cYcQY/9k1l4irIKeeVaJCyOQWI3CFQ9xdfqZXfS
-            XAFb+DeXsaHDHCeh0NPmDVp8u/LxAa7KullXoto5K0aVSqMOq07cuvkgjGqPt1tw
-            2CUgza9g3SGi33tMYg2XJQY+8xBGtddR5TZz6HLDQdXIXlwXDTlZuMHqfy3t
-            =Ie92
+            hQIMA1u//sli4/n1AQ/8CNuhO0W7tRk2SSSTsFYKNA6IWBXDIkSWYozSqi0D/2Il
+            AyWmTR0rr/pKVCD8hygDRt2pueJp8yPUAZ3P8vNOe1JvvoTFpJ5iWnqxZpd1jo4s
+            NmumTKVOHPWhekXx+njM57pmwUffQHSDgoumYsCizvwU0r60ReSvBXS+TLpk71nX
+            MDT6t8V8YM9LE+sh5cJ2XREJbQExxN/9GXPZL/CaCiAs54JJt/8gKzrepzqGieOr
+            7YOz6+dWf7yi1GiXP6yEyNplaEykwZvSqMziU68r4XvGZjkjeeuGTJ/BPlLL5aqK
+            99BkC5wilZbNInqUK4RxgBYXbgzDrbRVfFCEML3o+e2kuJVntZBh7jK8R3g2m2m5
+            zFhKhi5TID1kr8osvgh2TW5LAahpqypyRmdnshV6mbRtuCRrXFONvCvJOHiXYL97
+            MK6JiJXkia4mVZErgLezrrV8SZSBSX3S1gY1eIBmp4NFbTW/wSLjbXaYpkZeHCDA
+            GjswdHrmsJSYgCJX+E4p6v91509I/jVfuK8H/h9B8OSZ5R0Fsx0KklTP2x1Sindw
+            EQ4xPfsx7OS5o14uqafR/sr4ZPXj2wGrVJNJkNgCsnfZ2jP2sqlMd73MiHcjHjRy
+            ibaddLnXGr2prbBh/7vRytdAdSexNQGRSBp8QLt8H8owSpkIg0G4mALSLuAzvwfS
+            XgHJ7m70VTbCiQQfUhrNGfFXO6wo6cl7OYBKjpnr80PsY3XEjWheNNJ0hqpvUm4V
+            /B3nsspfZDINsKZ/oxuFXJ7TWhAUAOArNU7qwdTfbhKmoZLEkahmzdnK/0haKuI=
+            =PcdT
             -----END PGP MESSAGE-----
           fp: 9D02A9AD73EF7F3D5F657AC2B392F6EB325E8C50
-        - created_at: "2021-08-13T19:23:57Z"
+        - created_at: "2021-08-13T19:35:08Z"
           enc: |-
             -----BEGIN PGP MESSAGE-----
 
-            wcFMA7kpg2bgzVHcARAAWdKgN18iX+B+eevlbYEJMRDvXxh4XDQmFcQ16DDBhmhT
-            pAQdrULNrEzqmhVEMDBisOfNMyqIgkKfyh/DEF0IBUui8zR/zYhZnBpY3DC3BkDS
-            +Nu6TqdB5/luDBl15EfggUDOWH/8HG3MjP+80X1xBYFaZ+7naJv0y2vCmAVs2XTB
-            MBdjUGq3kPdcJDaqdYqdzVWxEmaqgUdH0nB0C3sNX/qG+Nt63NqPIUXX32Fx+um1
-            Xg3yPQJlFQHC94lyVPxPM/ndY0o80wmCPy/cnDDTNu2D2nYD7gFUzpVXfzgCEfJv
-            lyF0zsE2ylL95aWw1D/6mb5X5zVCGMUnxqPw3Ica9ZUBIfYusp/ZWpmodKjOhXGu
-            u+5hU0ty9kgaTAzH8mwO8nMy8YiA3YLBC3ZFE522nxBIxe9VwkW1KTCcYydQoH/n
-            QekgfWIKPx5bHisvvTVPHiYadZygQp9cyUgwvUYYyWKG2zcY7ztl3qI4n9TFqMNv
-            P4Bi111Ovzi9YwvkYqPTYjODF6g1VpRVWBXGmIEG6fM4BGRlKfNPKRkhC+VPt5tG
-            ZumkvvTFfz8OOiF1XWauDtjTo6GsH2xzalGqBKLNYEid7XhpDeCUt6VWAHTm7Xay
-            ziSZNnDyHqXJQrbaFngHxkHrWeMyFaRIWeZ347EM9ghwMugr7ChCMaPNfK+mNY7S
-            5gFEU82YG+haD4CLUo/aoxi57hMzT3IN+y9eaMfKYhpeHgQCkt2hffvvx6SFI0zA
-            a/KqllRYp3PRuq1ZDmw1sMDkgPXonniLRqvLE3WLylks4uJdBZS/AA==
-            =v3MQ
+            wcFMA7kpg2bgzVHcARAAooJ4UnuFoJrCasQ3HcOFgHW0gjPWF1qbDblTerrzPM4B
+            n0krJeEgtCvTgJtnDoDh98Y88IK2Cqmpivu1BUW2cq+7tSpmyJveTh6P4TC/1whE
+            lgSkK2hCnYdlEG8e4asD3DzhMkTrtRal3fiEhmM42yDG3xDLlPmE4hzdF2VuI15j
+            PRY90NOYIUP5blDFkoacUuKIdeDz6u7Ygfz89odnZF4NOPtRPPosyHLIaF09KL0d
+            yIf26Ygxt9LC1nk2a2gdJVWrmyyG5U0pqfCnN1wt+JdpPVY0BaCgxXR61Dy/IBOn
+            q9waDTafqJ/XPnd5A5ai3l0QPx438bsIgn3MmVXwOicYuZxxOGW0QMq4V5JEluOo
+            GssM4fdwnjtH6TdiYINJB4Lf/vKYX6HQWC/yhZn6cWI/+43on/M7rBFdeJNBA+r+
+            t3x/lh99v74hTZYK6a+g+0V+0g31h7ZVQux8aUhLrQsGjnCjU6NEeerYje9KVpdN
+            fYXIIRcBLrQ7bJlkWwC8+GJpYAJWYX/rEfLoBduVEvQWd/deloXmHX0XueQt24Es
+            xVH6JnTnT6lLC17q19aNxdaRvzv/1O17MwTbG9GTRSbV+UmqskmeXgWDPcyChQaL
+            fXlLqXSwkLz9rLSRFAOaTUWukKKBi6BqaE2oOfqyxbGw9dTDPKwvTXuWDex/QVDS
+            5gE6DTLUQj7E1uSk68XWDSVrUTw5iOtx/xrtnYupKicEQm214Me2MKFaxw54Ed4c
+            dgXAwZ2x5fBw2JI+hTGQu+XkvyinhefYKTOJvlm4hhsTh+LMP3vOAA==
+            =RNsR
             -----END PGP MESSAGE-----
           fp: 286791FB6648539775DB31B8FCB98C2A3EC6F601
     encrypted_regex: ^(data|stringData)$