documentation: correct mistake in how_to_use_git.md

documentation/how_to_use_git.md

@@ -64,7 +64,7 @@ part.
 
 You can look at the commit you just made:
 ```
-git commit log -n 3
+git log -n 3
 ```
 
 Now we need to sync your master branch with the master branch on Gitlab.