chore(release): 4.2.0 [skip ci]

# [4.2.0](https://gitlab.ics.muni.cz/perun-proxy-aai/simplesamlphp/simplesamlphp-module-lsaai/compare/v4.1.0...v4.2.0) (2023-09-13)

### Features

*  Forgotten username flow ([36ef4ec0](https://gitlab.ics.muni.cz/perun-proxy-aai/simplesamlphp/simplesamlphp-module-lsaai/commit/36ef4ec06b5108961f5ba0db8483c0a68c8aaa30))