docs: Update README with link to changelog (main)

Author: rayakame

README.md

@@ -20,4 +20,6 @@ A WASM plugin for SQLC allowing the generation of Python code.
 | mysql     | no      | no            | no          | no            | no      | no     | no          |
 
 ## Development
-A roadmap of what is planned & worked on can be found [here](https://github.com/users/rayakame/projects/1/)
+A roadmap of what is planned & worked on can be found [here](https://github.com/users/rayakame/projects/1/)
+### Changelog
+Can be found [here](https://github.com/rayakame/sqlc-gen-better-python/blob/main/CHANGELOG.md)