Switch maven publish to tag push

Author: TylerS1066

.github/workflows/gradle.yml

@@ -33,7 +33,7 @@ jobs:
       run: ./gradlew clean build --parallel
 
     - name: Publish to GitHub Packages
-      if: ${{ github.event_name == 'release' }}
+      if: github.event_name == 'push' && contains(github.ref, 'refs/tags/')
       run: ./gradlew publish --parallel
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}