chore: update readme

Author: vmihailenco

README.md

@@ -69,7 +69,7 @@ If you are using **Redis 6**, install go-redis/**v8**:
 go get github.com/go-redis/redis/v8
 ```
 
-If you are using **Redis 7**, install **go-redis/v9**:
+If you are using **Redis 7**, install go-redis/**v9**:
 
 ```shell
 go get github.com/go-redis/redis/v9