pull latest label from PR for skip changelog action

Author: kzheng-sfdc

.github/actions/changelog-check/action.yml

@@ -27,10 +27,19 @@ runs:
         fi
       shell: bash
 
+    - name: Get latest PR labels
+      id: get_pr
+      uses: octokit/request-action@v2.x
+      with:
+        route: GET /repos/${{ github.repository }}/issues/${{ inputs.pr_number }}
+      env:
+        GITHUB_TOKEN: ${{ github.token }}
+
     - name: Check if 'skip changelog' label is present
       id: check_labels
       run: |
-        SKIP_CHANGELOG_LABEL="${{ contains(github.event.pull_request.labels.*.name, 'skip changelog') }}"
+        echo "PR labels: ${{ toJSON(fromJSON(steps.get_pr.outputs.data).labels.*.name) }}"
+        SKIP_CHANGELOG_LABEL="${{ contains(fromJSON(steps.get_pr.outputs.data).labels.*.name, 'skip changelog') }}"
         if [ "$SKIP_CHANGELOG_LABEL" = "true" ]; then
           echo "Skip changelog label is present. Skipping changelog check."
           echo "SKIP_CHANGELOG_CHECK=true" >> $GITHUB_ENV