Chore: Add custom manager for workflow templates

.github/renovate.json

@@ -25,11 +25,6 @@
   "skipInstalls": false,
   "reviewers": ["team:grafana/plugins-platform-frontend"],
   "enabledManagers": ["custom.regex", "npm", "github-actions"],
-  // Extends the github-actions manager to include create-plugin workflow templates
-  // See: https://docs.renovatebot.com/modules/manager/#extending-a-managers-default-managerfilepatterns
-  "github-actions": {
-    "managerFilePatterns": ["/(^|/)packages/create-plugin/templates/github/workflows/.+\\.ya?ml$/"]
-  },
   "postUpdateOptions": ["npmDedupe"],
   "labels": ["dependencies", "javascript", "no-changelog"],
   "customManagers": [
@@ -49,6 +44,14 @@
       ],
       "depNameTemplate": "grafana/grafana-enterprise",
       "datasourceTemplate": "docker"
+    },
+    {
+      "customType": "regex",
+      "managerFilePatterns": ["/(^|/)packages/create-plugin/templates/github/workflows/.*\\.ya?ml$/"],
+      "matchStrings": [
+        "uses:\\s+(?<depName>[^@]+)@(?<currentValue>\\S+)"
+      ],
+      "datasourceTemplate": "github-actions"
     }
   ],
   "packageRules": [
@@ -131,12 +134,19 @@
       "matchPackageNames": ["!/^@?docusaurus/", "!/@grafana/*/"]
     },
     {
-      // disable automerge temporarily until we know the action can update create-plugin hbs templates.
+      "automerge": false,
+      "groupName": "create-plugin template github actions",
+      "labels": ["release", "patch", "create-plugin"],
+      "reviewers": ["sunker"],
+      "matchDatasources": ["github-actions"],
+      "matchFiles": ["packages/create-plugin/templates/github/workflows/**"]
+    },
+    {
       "automerge": false,
       "groupName": "auto-merged gitHub actions",
       "labels": ["ci", "github_actions", "dependencies", "no-changelog"],
-      "reviewers": ["jackw"],
-      "matchManagers": ["github-actions"]
+      "matchManagers": ["github-actions"],
+      "matchFiles": [".github/workflows/**"]
     }
   ],
   "vulnerabilityAlerts": {