Use only github.base_ref for reviewdog manifests test

Author: eleo007

.github/workflows/reviewdog.yml

@@ -87,12 +87,12 @@ jobs:
         with:
           go-version: '^1.24'
       - name: check on release branch
-        if: ${{ contains(github.head_ref, 'release-') || contains(github.base_ref, 'release-') }}
+        if: ${{ contains(github.base_ref, 'release-') }}
         run: |
           make generate manifests VERSION="$(grep -Eo "[0-9]+\.[0-9]+\.[0-9]+" pkg/version/version.txt)" IMAGE_TAG_BASE="percona/percona-server-mysql-operator"
           git diff --exit-code
       - name: check on non release branches
-        if: ${{ ! (contains(github.head_ref, 'release-') || contains(github.base_ref, 'release-')) }}
+        if: ${{ ! contains(github.base_ref, 'release-') }}
         run: |
           make generate manifests VERSION=main
           git diff --exit-code