ci: add orchestrator workflow file to PR path triggers

After a force push, GitHub evaluates path filters against only the
pushed commits, not the full PR diff. Changes to the orchestrator
workflow file itself were not matching the docs/** path filter,
preventing the orchestrator from running on the PR.

Signed-off-by: Ramon Roche <mrpollo@gmail.com>

.github/workflows/docs-orchestrator.yml

@@ -14,6 +14,7 @@ on:
   pull_request:
     paths:
       - "docs/**"
+      - ".github/workflows/docs-orchestrator.yml"
   workflow_dispatch:
 
 concurrency: