[FEATURE] Removed deprecated tracking option

Remove --set-upstream (deprecated) and use --track instead

Thanks to @markusfalk who reported the issue

Refs #2

Author: pixelbrackets

git_cheat_sheet.md

@@ -159,7 +159,7 @@
 
 * Set remote-tracking branch for current local branch
 
-		git branch --set-upstream <local-branch> <remote>/<remote-branch>
+		git branch --track <local-branch> <remote>/<remote-branch>
 
 * Delete a local branch