Add YAML listing file to considered files for custom message for preview

(cherry picked from commit 6fdc5fa)

Author: cderv

.github/workflows/preview.yml

@@ -133,6 +133,7 @@ jobs:
             # don't consider modifications on file used for includes for now.
             docs/**/[^_]*.qmd
             docs/**/[^_]*.md
+            docs/extensions/listings/*.yml
           json: true
           escape_json: false