Fix branding in CHANGELOG.md

Co-authored-by: kylegodbey <5806808+kylegodbey@users.noreply.github.com>

Author: Copilot

CHANGELOG.md

@@ -26,7 +26,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [0.1.0] - 2025-07-24
 
 ### Added
-- Initial release of pyBMC
+- Initial release of pybmc
 - Core functionality for Bayesian model combination
 - Data loading and preprocessing capabilities
 - Orthogonalization using SVD