docs(website): clean up Nix docs

website/docs/installation/nix.md

@@ -1,47 +1,51 @@
 ---
-sidebar_position: 4
+sidebar_position: 5
 ---
+
 # Nix
 
-If you are using Nix, **git-cliff** can be installed from the [official latest staple channel][channel-link].
+If you are using Nix, **git-cliff** can be installed from the [official latest stable channel](https://search.nixos.org/packages?channel=24.05&show=git-cliff&from=0&size=50&sort=relevance&type=packages&query=git-cliff).
 
 ## Using nix-shell
 
 To temporarily install git-cliff in a shell environment, run:
 
-```sh
+```bash
 nix-shell -p git-cliff
 ```
 
 ## Using nix-env
 
 To install git-cliff permanently, use:
 
-```sh
+```bash
 nix-env -iA nixpkgs.git-cliff
 ```
 
-> [!WARNING]
-> Using nix-env permanently modifies a local profile of installed packages.
-> This must be updated and maintained by the user in the same way as with a traditional package manager, 
-> foregoing many of the benefits that make Nix uniquely powerful. 
-> Using nix-shell or a NixOS configuration is recommended instead.
+:::warning
+
+Using nix-env permanently modifies a local profile of installed packages.
+This must be updated and maintained by the user in the same way as with a traditional package manager,
+foregoing many of the benefits that make Nix uniquely powerful.
+Using nix-shell or a NixOS configuration is recommended instead.
 
+:::
 
-## The new CLI
+## The New CLI
 
 If you're using the new experimental CLI, you can use any of the following:
 
-### `nix run
-```sh
+### `nix run`
+
+```bash
 nix run nixpkgs#git-cliff
 ```
 
 ### `nix shell`
 
 To open a new shell with git-cliff available, use:
 
-```sh
+```bash
 nix shell nixpkgs#git-cliff
 ```
 
@@ -51,12 +55,9 @@ While new releases of **git-cliff** typically become available in the stable cha
 
 To add and update the unstable channel, run:
 
-```sh
+```bash
 nix-channel --add https://nixos.org/channels/nixpkgs-unstable
 nix-channel --update nixpkgs
 ```
 
 After updating to the unstable channel, you can use any of the previous installation commands to install **git-cliff**.
-
-
-[channel-link]: https://search.nixos.org/packages?channel=24.05&show=git-cliff&from=0&size=50&sort=relevance&type=packages&query=git-cliff