ci: don't upload dependencies for PRs

Author: quintesse

.github/workflows/ci.yml

@@ -34,3 +34,5 @@ jobs:
     # Optional: Uploads the full dependency graph to GitHub to improve the quality of Dependabot alerts this repository can receive
     - name: Update dependency graph
       uses: advanced-security/maven-dependency-submission-action@571e99aab1055c2e71a1e2309b9691de18d6b7d6
+      if: github.event_name != 'pull_request'
+