Update PR template a smidge

Author: Luke Bowerman

pull_request_template.md

@@ -1,14 +1,17 @@
 ### :sparkles: Changes
 
 - **Thank you for your contribution to Looker Components!**
-- To ensure a successful review, please double check our checklist of requirements below. 
-- Also including a short description of changes and relevant screenshots will help us more quickly understand the ultimate goal of your work (🗑 replace this introduction with your summary of changes). 
+- To ensure a successful review, please double check our checklist of requirements below.
+- Also including a short description of changes and relevant screenshots will help us more quickly understand the ultimate goal of your work (🗑 replace this introduction with your summary of changes).
 
 ### :white_check_mark: Requirements
 
 - [ ] Includes test coverage for all changes
 - [ ] Build and tests are passing
-- [ ] PR is ideally < 400LOC
-- [ ] Link(s) to related Github issues
+- [ ] Update documentation
+- [ ] Updated CHANGELOG
+- [ ] Checked for i18n impacts
+- [ ] Checked for a11y impacts
+- [ ] PR is ideally < ~400LOC
 
 ### :camera: Screenshots