Merge pull request #8767 from issyl0/update-pr-template-brew-man

PULL_REQUEST_TEMPLATE: Add a checklist item for `brew man`

.github/PULL_REQUEST_TEMPLATE.md

@@ -4,5 +4,6 @@
 - [ ] Have you written new tests for your changes? [Here's an example](https://github.com/Homebrew/brew/blob/HEAD/Library/Homebrew/test/PATH_spec.rb).
 - [ ] Have you successfully run `brew style` with your changes locally?
 - [ ] Have you successfully run `brew tests` with your changes locally?
+- [ ] Have you successfully run `brew man` locally and committed any changes?
 
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