Fix s-form of simple present tense to refactor description

Author: jordanmccullough

downloads/github-git-cheat-sheet.md

@@ -111,7 +111,7 @@ Deletes the specified branch
 
 
 ## Refactor filenames
-Relocates and remove versioned files
+Relocates and removes versioned files
 
 
 ```$ git rm [file]```