composer(deps-dev): bump spatie/ignition from 1.15.0 to 1.15.1

Bumps [spatie/ignition](https://github.com/spatie/ignition) from 1.15.0 to 1.15.1.
- [Release notes](https://github.com/spatie/ignition/releases)
- [Changelog](https://github.com/spatie/ignition/blob/main/CHANGELOG.md)
- [Commits](spatie/ignition@1.15.0...1.15.1)

---
updated-dependencies:
- dependency-name: spatie/ignition
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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