Reformat all code to use shell instead of sh

snippets/delete-stash.md

@@ -7,10 +7,10 @@ Deletes a specific stash.
 
 - Use `git stash drop <stash>` to delete the given `<stash>`.
 
-```sh
+```shell
 git stash drop <stash>
 ```
 
-```sh
+```shell
 git stash drop stash@{1} # Deletes `stash@{1}`
 ```