chore: stop sending notification for update python requirements on un…

…changed

.github/workflows/upgrade-python-requirements.yml

@@ -105,7 +105,7 @@ jobs:
           body: Upgrade python requirements workflow in ${{github.repository}} failed! For details see "github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}"
 
       - name: Send success notification
-        if: ${{ inputs.send_success_notification && inputs.email_address }}
+        if: ${{ inputs.send_success_notification && inputs.email_address && steps.createpullrequest.outputs.generated_pr }}
         uses: dawidd6/action-send-mail@v3
         with:
           server_address: email-smtp.us-east-1.amazonaws.com