Update diff_comment.yml

.github/workflows/diff_comment.yml

@@ -8,19 +8,21 @@ on:
 jobs:
   comment:
     runs-on: ubuntu-latest
-    if: github.event.workflow_run.outputs.diff_generated
+    if: github.event.workflow_run.jobs['diff'].steps.upload-log.outputs.artifact_id 
     permissions:
       issues: write
     steps:
       - name: Get the PR number
         id: get_pr_number
         run: |
           echo "pr_number=$(jq '.workflow_run.pull_requests[0].number' $GITHUB_EVENT_PATH)" >> $GITHUB_OUTPUT
+          
       - name: Download diff
         uses: actions/download-artifact@v4
         with:
           name: openapi-diff-log
-          workflow: 'Lint and validate OpenAPI specs'
+          workflow: 'Lint and validate OpenAPI specs' 
+
       - name: Create PR comment
         uses: actions/github-script@v7
         with: