fix reference to Azure China 21Vianet

Author: v-kents

articles/azure-cache-for-redis/cache-remove-tls-10-11.md

@@ -28,12 +28,12 @@ This article provides general guidance about how to detect dependencies on these
 
 The dates when these changes take effect are:
 
-| Cloud               | Phase 1 Start Date | Phase 2 Start Date      |
-|---------------------|--------------------|-------------------------|
-| Azure (global)      |  January 13, 2020  | May 11, 2020            |
-| Azure Government    |  March 13, 2020    | May 11, 2020            |
-| Azure Germany       |  March 13, 2020    | May 11, 2020            |
-| Azure China         |  March 13, 2020    | May 11, 2020            |
+| Cloud                | Phase 1 Start Date | Phase 2 Start Date      |
+|----------------------|--------------------|-------------------------|
+| Azure (global)       |  January 13, 2020  | May 11, 2020            |
+| Azure Government     |  March 13, 2020    | May 11, 2020            |
+| Azure Germany        |  March 13, 2020    | May 11, 2020            |
+| Azure China 21Vianet |  March 13, 2020    | May 11, 2020            |
 
 ## Check whether your application is already compliant