Update pull_request_template.md

add example completed checkbox

Author: wiz0floyd

.github/pull_request_template.md

@@ -4,6 +4,7 @@ replace this with your description
 # Pull Request Checklist
 
 ## Overview
+- [x] Put an x inside of the square brackets to check each item.
 - [ ] I have read and understood the [CONTRIBUTING.md](CONTRIBUTING.md) guidelines
 - [ ] My pull request has a descriptive title that accurately reflects the changes and the description has been filled in above.
 - [ ] I've included only files relevant to the changes described in the PR title and description