chore: update CDN cache purge command in production workflow (#660)

- Replaced the old CDN cache purge command with a new command using the CreatePurgeTask method, enhancing the cache management process for production.

Author: shhdgit

.github/workflows/production.yml

@@ -208,4 +208,4 @@ jobs:
 
       - name: Purge production CDN cache
         run: |
-          tccli cdn PurgePathCache --Paths '["https://docs.pingcap.com/"]' --FlushType flush
+          tccli teo CreatePurgeTask --cli-unfold-argument --ZoneId ${{ secrets.TENCENTCLOUD_EO_DOCS_ZONEID }} --Type purge_prefix --Method invalidate --Targets 'https://docs.pingcap.com'