[hotfix][ci] Add .dlc.json to paths-ignore in Flink CDC CI workflow

Prevent documentation-only changes (dead link check config) from
triggering unnecessary unit and E2E tests.

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

Author: lvyanquan

.github/workflows/flink_cdc_ci.yml

@@ -22,13 +22,15 @@ on:
     paths-ignore:
       - 'docs/**'
       - 'README.md'
+      - '.dlc.json'
   pull_request:
     branches:
       - master
       - release-*
     paths-ignore:
       - 'docs/**'
       - 'README.md'
+      - '.dlc.json'
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.event.number || github.run_id }}