Bump spatie/laravel-medialibrary from 10.14.0 to 10.15.0

Bumps [spatie/laravel-medialibrary](https://github.com/spatie/laravel-medialibrary) from 10.14.0 to 10.15.0.
- [Release notes](https://github.com/spatie/laravel-medialibrary/releases)
- [Changelog](https://github.com/spatie/laravel-medialibrary/blob/main/CHANGELOG.md)
- [Commits](spatie/laravel-medialibrary@10.14.0...10.15.0)

---
updated-dependencies:
- dependency-name: spatie/laravel-medialibrary
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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