updated workflow

.github/workflows/tests.yml

@@ -102,6 +102,7 @@ jobs:
       - name: Set GH_TOKEN
         run: echo "GH_TOKEN=${{ secrets.GITHUB_TOKEN }}" >> $GITHUB_ENV
       - name: Trigger Build Docker Images Workflow
+        if: github.event_name != 'pull_request'
         run: |
           BRANCH_NAME=${GITHUB_REF#refs/heads/}
           gh workflow run build-docker-images.yml --ref $BRANCH_NAME -f branch_name=$BRANCH_NAME