Docs: Edited the preview GHA

Author: Seluj78

.github/workflows/preview-docs.yml

@@ -1,12 +1,22 @@
-name: Preview Documentation
+name: Read the Docs PR preview
+# Automatically edits a pull request's descriptions with a link
+# to the documentation's preview on Read the Docs.
+
 on:
   pull_request_target:
     types:
       - opened
+    paths:
+    - 'docs/**'
+    - '.github/workflows/preview-docs.yml'
 
 permissions:
   pull-requests: write
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
   documentation-links:
     runs-on: ubuntu-latest