Update pull_request_template.md

fix incorrect makedown usage

pull_request_template.md

@@ -5,15 +5,15 @@ Fixes # (issue)
 
 ## Type of change
 
-- [] Bug fix (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)
-- [] This change requires a documentation update
+- [ ] Bug fix (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)
+- [ ] This change requires a documentation update
 
 ## Checklist:
 
-- [] I have performed a self-review of my own code
-- [] I have commented my code, particularly in hard-to-understand areas
-- [] I have made corresponding changes to the documentation(if necessary)
-- [] I have added tests to cover my changes
-- [] All new and existing tests passed█
+- [ ] I have performed a self-review of my own code
+- [ ] I have commented my code, particularly in hard-to-understand areas
+- [ ] I have made corresponding changes to the documentation(if necessary)
+- [ ] I have added tests to cover my changes
+- [ ] All new and existing tests passed█