fix CI badge

Author: jorenham

README.md

@@ -9,7 +9,7 @@
 [![Ruff][IMG-RUFF]](https://github.com/astral-sh/ruff)
 [![Pyright][IMG-PYRIGHT]](https://microsoft.github.io/pyright/)
 
-[IMG-GHA]: https://img.shields.io/github/actions/workflow/status/jorenham/Lmo/CI.yml?branch=master
+[IMG-GHA]: https://img.shields.io/github/actions/workflow/status/jorenham/Lmo/ci.yml?branch=master
 [IMG-BSD]: https://img.shields.io/github/license/jorenham/Lmo
 [IMG-PYPI]: https://img.shields.io/pypi/v/Lmo
 [IMG-VER]: https://img.shields.io/pypi/pyversions/Lmo