Trigger GitHub Actions only when tag is added (#299)

Author: comfyui-wiki

.github/workflows/external-link-tracking.yml

@@ -2,6 +2,7 @@ name: External Link Tracking
 
 on:
   pull_request:
+    types: [labeled]
     paths:
       - '**/*.mdx'
       - '**/*.md'
@@ -15,6 +16,9 @@ on:
 jobs:
   check-external-links:
     runs-on: ubuntu-latest
+    if: |
+      github.event_name == 'push' || 
+      (github.event_name == 'pull_request' && contains(github.event.pull_request.labels.*.name, 'link-check'))
     permissions:
       contents: read
       pull-requests: write