[Feature][CI] Schedule Dead Link Checker (#10000)

.github/workflows/docs.yml

@@ -22,6 +22,8 @@ on:
       - '.github/workflows/docs.yml'
       - '**/*.md'
       - 'docs/**'
+  schedule:
+    - cron: '0 18 * * *'  # TimeZone: UTC 0
 
 concurrency:
   group: doc-${{ github.event.pull_request.number || github.ref }}
@@ -47,6 +49,7 @@ jobs:
         run: python img_utils.py -v check
   dead-link:
     name: Dead Link
+    if: (github.event_name == 'schedule' && github.repository == 'apache/dolphinscheduler') || (github.event_name != 'schedule')
     runs-on: ubuntu-latest
     timeout-minutes: 30
     steps: