Adding push condition

Author: vojtatom

.github/workflows/release.yaml

@@ -8,7 +8,7 @@ on:
 jobs:
   release:
     runs-on: ubuntu-latest
-    if: contains(github.event.base_ref, 'main')
+    if: github.event_name == 'push' && contains(github.event.base_ref, 'main')
     steps:
     - uses: actions/checkout@v2
     - uses: ncipollo/release-action@v1