docs: Change go mod init command example

Doesn't it make sense to use the command from the official Go tutorial for the description? Here is the link to it: https://go.dev/doc/tutorial/create-module

Author: gowizzard

README.md

@@ -69,7 +69,7 @@ go-redis supports 2 last Go versions and requires a Go version with
 module:
 
 ```shell
-go mod init github.com/my/repo
+go mod init example.com/greetings
 ```
 
 Then install go-redis/**v9**: