change template

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,14 +1,14 @@
 Before submitting your PR, check that you've:
 
-- [ ] Bumped the version number
 - [ ] Documented new APIs with [Haddock markup](https://www.haskell.org/haddock/doc/html/index.html)
 - [ ] Added [`@since` declarations](http://haskell-haddock.readthedocs.io/en/latest/markup.html#since) to the Haddock
 
 After submitting your PR:
 
 - [ ] Update the Changelog.md file with a link to your PR
+- [ ] Bumped the version number if there isn't an `(unreleased)` on the Changelog
 - [ ] Check that CI passes (or if it fails, for reasons unrelated to your change, like CI timeouts)
 
 <!---Thanks so much for contributing! :)
 
-_If these checkboxes don't apply to your PR, you can delete them_-->
+_If these checkboxes don't apply to your PR, you can delete them_-->