chore: improve pull request template (#277)

Signed-off-by: Jason Liu <[email protected]>

.github/pull_request_template.md

@@ -0,0 +1,22 @@
+### Ⅰ. Describe what this PR does
+
+<!--
+- Summarize your change (**mandatory**)
+- How does this PR work? Need a brief introduction for the changed logic (optional)
+- Describe clearly one logical change and avoid lazy messages (optional)
+- Describe any limitations of the current code (optional)
+-->
+
+### Ⅱ. Does this pull request fix one issue?
+
+<!--If so, add "fixes #xxxx" below in the next line, for example, fixes #15. Otherwise, add "NONE" -->
+
+### Ⅲ. Describe how to verify it
+
+### Ⅳ. Special notes for reviews
+
+### V. Checklist
+
+- [ ] I have written necessary docs and comments
+- [ ] I have added necessary unit tests and integration tests
+- [ ] All checks passed in `make test`

CONTRIBUTING.md

@@ -89,7 +89,7 @@ Make any change on the new-branch then build and test your codes.
 
 PR is the only way to make change to Koordinator project files. To help reviewers better get your purpose, PR
 description could not be too detailed. We encourage contributors to follow
-the [PR template](./.github/PULL_REQUEST_TEMPLATE.md) to finish the pull request.
+the [PR template](./.github/pull_request_template.md) to finish the pull request.
 
 ### Developing Environment