Revert changes to PRLabelChecker.yml

Co-authored-by: simongdavies <1397489+simongdavies@users.noreply.github.com>

Author: Copilot

.github/workflows/PRLabelChecker.yml

@@ -14,9 +14,9 @@ jobs:
       - uses: actions/checkout@v4
       - name: Ensure exactly one "kind/*" label is applied
         run: |
-          # Count the number of "kind/*" labels using GitHub API via github.event
-          LABELS=$(echo '${{ toJSON(github.event.pull_request.labels) }}' | jq -r '.[].name')
-          KIND_LABEL_COUNT=$(echo "$LABELS" | grep -c "^kind/" || true)
+          # Count the number of "kind/*" labels directly from the PR labels
+          PR_NUMBER=${{ github.event.pull_request.number }}
+          KIND_LABEL_COUNT=$(gh pr view "$PR_NUMBER" --json labels -q '.labels.[].name' | grep -c '^kind/')
 
           if [[ "$KIND_LABEL_COUNT" -eq 1 ]]; then
             echo "✅ Exactly one 'kind/*' label is applied."
@@ -25,3 +25,5 @@ jobs:
             echo "❌ PR must have exactly one 'kind/*' label, but found $KIND_LABEL_COUNT."
             exit 1
           fi
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}