getting-started(guix): fix grammatical error

Author: Andrew Wong

src/pages/docs/configuration/getting-started.mdx

@@ -62,7 +62,7 @@ sudo dnf install quickshell
 ```
 
 ## Guix
-This repo works as a channel. Add the following to your channel list:
+Quickshell's source repository works as a channel. Add the following to your channel list:
 
 ```scheme
 (channel