chore: update PR template

.github/pull_request_template.md

@@ -9,20 +9,9 @@ and we'll evaluate if we can setup a [CLA](https://en.wikipedia.org/wiki/Contrib
 
 ## For Internal Contributors
 
-[<TICKET_ID>](https://sendbird.atlassian.net/browse/<TICKET_ID>)
-
 ## Description Of Changes
 
 Add a brief description of the changes that you have involved in this PR
+Follow conventional commit format: https://www.conventionalcommits.org/en/v1.0.0/
 
-## Types Of Changes
-
-What types of changes does your code introduce to this project?
-Put an `x` in the boxes that apply_
-
-- [ ] Bugfix
-- [ ] New feature
-- [ ] Documentation (correction or otherwise)
-- [ ] Cosmetics (whitespace, appearance (ex) Prettier)
-- [ ] Build configuration
-- [ ] Improvement (refactor code)
+[<TICKET_ID>](https://sendbird.atlassian.net/browse/<TICKET_ID>)