docs: update uninstall.md to fix Arch uninstall commands

Author: j-tag

content/manuals/desktop/uninstall.md

@@ -187,7 +187,7 @@ To uninstall Docker Desktop for Arch:
 1. Remove the Docker Desktop application. Run:
 
    ```console
-   $ sudo pacman remove docker-desktop
+   $ sudo pacman -Rsn docker-desktop
    ```
 
    This removes the Docker Desktop package itself but doesn’t delete all of its files or settings.
@@ -197,7 +197,6 @@ To uninstall Docker Desktop for Arch:
    ```console
    $ rm -r $HOME/.docker/desktop
    $ sudo rm /usr/local/bin/com.docker.cli
-   $ sudo apt purge docker-desktop
    ```
 
    This removes configuration and data files at `$HOME/.docker/desktop`, the symlink at `/usr/local/bin/com.docker.cli`, and purges the remaining systemd service files.