Merge pull request redis#2360 from monkey92t/compatible

docs: updated "Installation" description in README.md

Author: vmihailenco

README.md

@@ -53,18 +53,19 @@ module:
 go mod init github.com/my/repo
 ```
 
-If you are using **Redis 6**, install go-redis/**v8**:
+If you are using **Redis 7**, install go-redis/**v9**:
 
 ```shell
-go get github.com/go-redis/redis/v8
+go get github.com/go-redis/redis/v9
 ```
 
-If you are using **Redis 7**, install go-redis/**v9**:
+You can also use the stable version go-redis/**v8** (v8 does not support redis 7):
 
 ```shell
-go get github.com/go-redis/redis/v9
+go get github.com/go-redis/redis/v8
 ```
 
+
 ## Quickstart
 
 ```go