Merge pull request #302091 from flang-msft/fxl---UUF-411651---What-is-Azure-Cache-for-Redis--

fxl---added overview to ACR TOC

Author: prmerger-automator[bot]

articles/azure-cache-for-redis/TOC.yml

@@ -61,8 +61,8 @@
 - name: Azure Cache for Redis 
   expanded: true
   items:
-  - name: What's new in Azure Cache for Redis?
-    href: cache-whats-new.md
+  - name: About Azure Cache for Redis
+    href: cache-overview.md
 
   - name: Deploy and configure
     items: