MINOR: Fix typo

Author: olgabrani

Diff for: README.md

@@ -685,7 +685,7 @@ git diff --staged
 
 ## Extract file from another branch.
 ```sh
-git show <banch_name>:<file_name>
+git show <branch_name>:<file_name>
 ```
 
 ## List only the root and merge commits.