Add extra type of change.

Author: bartcode

pull_request_template.md

@@ -7,6 +7,7 @@ Fixes #(issue)
 ## Type of change
 
 - [ ] Bug fix (non-breaking change which fixes an issue)
+- [ ] Documentation update
 - [ ] New feature (non-breaking change which adds functionality)
 - [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
 - [ ] This change requires a documentation update