update pr-template

.github/pull_request_template.md

@@ -13,7 +13,6 @@ _Put an `x` in the boxes that apply_
 -   [ ] Bugfix (non-breaking change which fixes an issue)
 -   [ ] New feature (non-breaking change which adds functionality)
 -   [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
--   [ ] Documentation update (Documentation content changed)
 -   [ ] Other (please describe):
 
 ## Checklist
@@ -22,6 +21,7 @@ _Put an `x` in the boxes that apply_
 
 -   [ ] My code follows the [style guidelines of this project](https://docs.google.com/document/d/1GI2Hile8UbGZ82gFe1y4wAVPcNPXip1cmXTzog1S41U/edit)
 -   [ ] I have performed a self-review of my own code
+-   [ ] I have created new branch for this pull request
 -   [ ] I have commented my code, particularly in hard-to-understand areas
 -   [ ] I have made corresponding changes to the documentation
 -   [ ] My changes generate no new warnings