docs: fix PR template

Author: mtrezza

.github/pull_request_template.md

@@ -26,4 +26,3 @@ Closes: FILL_THIS_OUT
 - [ ] Add changes to documentation (guides, repository pages, in-code descriptions)
 - [ ] Add [security check](https://github.com/parse-community/parse-server/blob/master/CONTRIBUTING.md#security-checks)
 - [ ] Add new Parse Error codes to Parse JS SDK <!-- no hard-coded error codes in Parse Server -->
-- [x] A changelog entry is created automatically using the pull request title (do not manually add a changelog entry)