Fix typo in blurb issue template (#488)

Author: hauntsaninja

.github/ISSUE_TEMPLATE/blurb.md

@@ -6,7 +6,7 @@ about: Feature request or bug related to blurb (command line tool)
 <!--
 Request new feature or report a bug with Blurb (command line tool)
 
-For blurb-it GitHub App, go to https://github.com/python/blurb-it
+For blurb-it GitHub App, go to https://github.com/python/blurb_it
 
 -->