(chore): Bump webmozart/assert in the composer group

Bumps the composer group with 1 update: [webmozart/assert](https://github.com/webmozarts/assert).


Updates `webmozart/assert` from 1.12.0 to 1.12.1
- [Release notes](https://github.com/webmozarts/assert/releases)
- [Changelog](https://github.com/webmozarts/assert/blob/master/CHANGELOG.md)
- [Commits](webmozarts/assert@1.12.0...1.12.1)

---
updated-dependencies:
- dependency-name: webmozart/assert
  dependency-version: 1.12.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: composer
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]