Add missing link references to earlier tags

Author: mattt

Changelog.md

@@ -162,3 +162,5 @@ Initial release.
 [0.1.0]: https://github.com/SwiftDocOrg/swift-doc/releases/tag/0.1.0
 [0.0.4]: https://github.com/SwiftDocOrg/swift-doc/releases/tag/0.0.4
 [0.0.3]: https://github.com/SwiftDocOrg/swift-doc/releases/tag/0.0.3
+[0.0.2]: https://github.com/SwiftDocOrg/swift-doc/releases/tag/0.0.2
+[0.0.1]: https://github.com/SwiftDocOrg/swift-doc/releases/tag/0.0.1