ci(renovate): Add ability to define version extraction

This patch adds the ability to sepcify a regex for version extraction.
This is needed to get the talos upgrades working as expected.

References:
https://github.com/mchestr/home-cluster/blob/62e93c129e32509dc2e5ec9ed77b7b3ebada0538/.github/renovate/regexManagers.json5#L4-L19

renovate.json

@@ -66,7 +66,7 @@
         "\\.yaml$"
       ],
       "matchStrings": [
-        "# 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"
+        "# renovate: datasource=(?<datasource>[a-z-.]+?) depName=(?<depName>[^\\s]+?)(?: (lookupName|packageName)=(?<packageName>[^\\s]+?))?(?: versioning=(?<versioning>[^\\s]+?))?(?: registryUrl=(?<registryUrl>[^\\s]+?))?(?: extractVersion=(?<extractVersion>.+?))?\\s+\\S+?: \"?(?<currentValue>.+?)@?(?<currentDigest>sha256:[a-f0-9]+)?\"?\\s"
       ]
     },
     {