docs: update CHANGELOG.md for v0.3.0

Author: github-actions[bot]

CHANGELOG.md

@@ -1,6 +1,5 @@
 ## What's Changed
 
-- fix: Replace git-cliff-action with native git log for release notes ([7e28df7](https://github.com/d-oit/gh-sub-issues/commit/7e28df701e90ab695921fef3273dc75c39160e27))
-- fix: Make GitHub API wrapper test more robust for CI environment ([11b14e1](https://github.com/d-oit/gh-sub-issues/commit/11b14e1475bcf898f728703b122cea8314ebb2eb))
-- feat: Add comprehensive logging and debugging capabilities ([e83757f](https://github.com/d-oit/gh-sub-issues/commit/e83757f9a1ad59fadc77bf92db42047ad72d6783))
-**Full Changelog**: https://github.com/d-oit/gh-sub-issues/compare/v0.1.4...v0.2.0
+- Merge branch 'main' of https://github.com/d-oit/gh-sub-issues ([d3b0200](https://github.com/d-oit/gh-sub-issues/commit/d3b0200ee58362d491d6969a00b1cae69480ed00))
+- fix: Make issue processing in release workflow more robust ([6c60d75](https://github.com/d-oit/gh-sub-issues/commit/6c60d752c00b454c15f1ab96d95e8e2124d41830))
+**Full Changelog**: https://github.com/d-oit/gh-sub-issues/compare/v0.2.0...v0.3.0