make consistent delete branch step

Author: beardofedu

responses/02r_merge-pr.md

@@ -6,7 +6,7 @@ You can merge<sup>[:book:](https://help.github.com/articles/github-glossary/#mer
 
 1. Click **Merge pull request** below
 1. Click **Confirm merge**
-1. Go ahead and delete your branch in this pull request
+1. Click **Delete branch**
 
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 <h3 align="center">Watch below for my response</h3>