fix(ci): add workflow file to pull_request trigger paths

- Include docs.yaml in pull_request paths to trigger validation builds
  when the workflow itself is modified

Signed-off-by: Major Hayden <major@redhat.com>

Author: major

.github/workflows/docs.yaml

@@ -18,6 +18,7 @@ on:
       - 'src/**'
       - 'mkdocs.yml'
       - 'scripts/gen_api_ref.py'
+      - '.github/workflows/docs.yaml'
   workflow_dispatch:
 
 permissions: