fix: add zsh install to alt

Author: Keshav-writes-code

src/content/docs/linux/dev-environment.mdx

@@ -10,7 +10,7 @@ My OS of choice is Antix Linux
 
 ## Install Prerequisite
 ```shell 
-sudo apt install curl git fzf fd-find
+sudo apt install curl git fzf fd-find zsh
 ```
 
 ## Terminal Setup