[WIP] v2.4.0 の alpha や beta を CHANGELOG.md から除外する

[m-tmatma]

[WIP] v2.4.0 の alpha や beta を CHANGELOG.md から除外する

sakura-editor/sakura#1232

[m-tmatma]

https://github.com/github-changelog-generator/github-changelog-generator/wiki/Advanced-change-log-generation-examples

の exclude-tags を指定してみた。
→ 期待したのと違う

https://ci.appveyor.com/api/buildjobs/cc4c3xds0pyadav0/artifacts/CHANGELOG_without_issues.md

[Full Changelog](https://github.com/sakura-editor/sakura/compare/v2.4.0...HEAD)
[Full Changelog](https://github.com/sakura-editor/sakura/compare/v2.4.0-beta5...v2.4.0)
[Full Changelog](https://github.com/sakura-editor/sakura/compare/v2.3.1.0...v2.3.2.0)
[Full Changelog](https://github.com/sakura-editor/sakura/compare/v2.3.0.0...v2.3.1.0)
[Full Changelog](https://github.com/sakura-editor/sakura/compare/v2.2.0.1...v2.3.0.0)
[Full Changelog](https://github.com/sakura-editor/sakura/compare/v2.2.0.0...v2.2.0.1)
[Full Changelog](https://github.com/sakura-editor/sakura/compare/c1357c0cf2b5dcee5458d2e48f2b0b3130643db9...v2.2.0.0)