docs: Fix upgrade guide versions

Author: szuperaz

docusaurus/docs/Angular/basics/upgrade-v2.mdx

@@ -34,15 +34,15 @@ You can find the full list of breaking changes in stream-chat [v5](https://githu
 Run the following command to updgrade if you're using Angular 13:
 
 ```
-npm install stream-chat@6.3.0 stream-chat-angular@3.0.0-beta.8
+npm install stream-chat@6.4.0 stream-chat-angular
 ```
 
 #### Angular 12
 
 Run the following command to updgrade if you're using Angular 12:
 
 ```
-npm install stream-chat@6.3.0 stream-chat-angular@3 --legacy-peer-deps
+npm install stream-chat@6.4.0 stream-chat-angular@3 --legacy-peer-deps
 ```
 
 ### stream-chat-css