run only on scheduled executions

Author: yeikel

.github/workflows/cve_checks.yml

@@ -74,7 +74,7 @@ jobs:
 
   notify:
     needs: check-cves
-    if: ${{ always() && needs.build-and-test.result == 'failure' && github.ref == 'refs/heads/main' }}
+    if: ${{ always() && needs.build-and-test.result == 'failure' && github.event_name == 'schedule' }}
     uses: ./.github/workflows/infra_discord_hook.yml
     with:
       message: "Attention! CVE checks run failed! Please fix them CVEs :("