doc: Commit log should follow semver rule (#2477)

Co-authored-by: Anthony Fu <[email protected]>

Author: zk4

.github/contributing.md

@@ -54,7 +54,7 @@ Some common test helpers, e.g. `testDir`, `isBuild` or `editFile` are available
 
 - If fixing bug:
 
-  - If you are resolving a special issue, add `(fix #xxxx[,#xxxx])` (#xxxx is the issue id) in your PR title for a better release log, e.g. `update entities encoding/decoding (fix #3899)`.
+  - If you are resolving a special issue, add `(fix #xxxx[,#xxxx])` (#xxxx is the issue id) in your PR title for a better release log, e.g. `fix: update entities encoding/decoding (fix #3899)`.
   - Provide a detailed description of the bug in the PR. Live demo preferred.
   - Add appropriate test coverage if applicable. You can check the coverage of your code addition by running `yarn test --coverage`.