api: move the aliases for /tidbcloud/api-overview/ to api/tidb-cloud-api-overview.md (#22524) (#22530)

Author: ti-chi-bot

api/_index.md

@@ -1,7 +1,6 @@
 ---
 title: TiDB API Overview
 summary: Learn about the APIs available for TiDB Cloud and TiDB Self-Managed.
-aliases: ['/tidbcloud/api-overview/']
 ---
 
 # TiDB API Overview

api/tidb-cloud-api-overview.md

@@ -1,6 +1,7 @@
 ---
 title: TiDB Cloud API Overview
 summary: Learn about what TiDB Cloud API is, its features, and how to use the API to manage your TiDB Cloud clusters.
+aliases: ['/tidbcloud/api-overview/']
 ---
 
 # TiDB Cloud API Overview