ci(renovate): Allow digest pinning for regex manager

renovate.json

@@ -82,7 +82,7 @@
         "\\.yaml$"
       ],
       "matchStrings": [
-        "# renovate: datasource=(?<datasource>[a-z-.]+?) depName=(?<depName>[^\\s]+?)(?: (lookupName|packageName)=(?<packageName>[^\\s]+?))?(?: versioning=(?<versioning>[^\\s]+?))?(?: registryUrl=(?<registryUrl>[^\\s]+?))?\\s+\\S+?: \"?(?<currentValue>.+?)\"?\\s"
+        "# renovate: datasource=(?<datasource>[a-z-.]+?) depName=(?<depName>[^\\s]+?)(?: (lookupName|packageName)=(?<packageName>[^\\s]+?))?(?: versioning=(?<versioning>[^\\s]+?))?(?: registryUrl=(?<registryUrl>[^\\s]+?))?\\s+\\S+?: \"?(?<currentValue>.+?)@?(?<currentDigest>sha256:[a-f0-9]+)?\"?\\s"
       ]
     },
     {