Typo in github.ref check

Author: phavekes

.github/workflows/build-php72-apache2.yaml

@@ -66,7 +66,7 @@ jobs:
     if: >
       github.actor!='dependabot[bot]' &&
       github.event_name!='pull_request' &&
-      github.ref == 'ref/head/main'
+      github.ref == 'refs/heads/main'
     needs:
       - "build-php72"
     runs-on: "ubuntu-24.04"