Update pull_request_template.md

Author: denis-fokin

.github/pull_request_template.md

@@ -10,6 +10,7 @@ Please delete options that are not relevant.
 
 - Minor bug fix (non-breaking small changes)
 - Bug fix (non-breaking change which fixes an issue)
+- Refactoring (typos and non-functional changes) 
 - New feature (non-breaking change which adds functionality)
 - Breaking change (fix or feature that would cause existing functionality to not work as expected)
 
@@ -27,10 +28,12 @@ Please, provide several scenarios that you went through to verify that the chang
 
 # Checklist (remove irrelevant options):
 
+_This is the author self-check list_
+
 - [ ] The change followed the style guidelines of the UTBot project
 - [ ] Self-review of the code is passed
 - [ ] The change contains enough commentaries, particularly in hard-to-understand areas
 - [ ] New documentation is provided or existed one is altered
 - [ ] No new warnings
-- [ ] Tests that prove my change is effective
+- [ ] New tests have been added
 - [ ] All tests pass locally with my changes