Fix CHANGELOG links

Author: jthomperoo

CHANGELOG.md

@@ -18,5 +18,5 @@ Versioning](https://semver.org/spec/v2.0.0.html).
         - Can choose the log verbosity with the `-v` flag.
         - Can choose to log to a file.
 
-[Unreleased]: https://github.com/jthomperoo/simple-proxy/compare/v2.5.0...HEAD
-[0.1.0]: https://github.com/jthomperoo/simple-proxy/releases/tag/0.1.0
+[Unreleased]: https://github.com/jthomperoo/simple-proxy/compare/v1.0.0...HEAD
+[v1.0.0]: https://github.com/jthomperoo/simple-proxy/releases/tag/v1.0.0