fix: remove followTag config as it doesn't work with branches (#254)

followTag is designed for npm tags, not git branches.

Refs: renovatebot/renovate#28016

Co-authored-by: Claude <noreply@anthropic.com>

Author: deviantintegral

renovate.json

@@ -34,15 +34,6 @@
     }
   ],
   "packageRules": [
-    {
-      "matchManagers": [
-        "github-actions"
-      ],
-      "matchPackageNames": [
-        "deviantintegral/github-action-renovate-config-validator"
-      ],
-      "followTag": "fix-renovate-version"
-    },
     {
       "minimumReleaseAge": "3 days",
       "automerge": true,