Add workflow_dispatch and self-path trigger to docs workflow

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: msitarzewski

.github/workflows/docs.yml

@@ -6,6 +6,8 @@ on:
     paths:
       - 'docs/**'
       - 'mkdocs.yml'
+      - '.github/workflows/docs.yml'
+  workflow_dispatch:
 
 permissions:
   contents: read