Fix atuin dotfiles alias command example (#46)

The command to create a new alias is `autin dotfiles alias set`, not
`atuin dotfiles alias create`

src/content/docs/configuration/config.mdx

@@ -472,7 +472,7 @@ Manage aliases using the command line options
 
 ```
 # Alias 'k' to 'kubectl'
-atuin dotfiles alias create k kubectl
+atuin dotfiles alias set k kubectl
 
 # List all aliases
 atuin dotfiles alias list