Build(deps-dev): bump slevomat/coding-standard

Bumps the dev-dependencies group with 1 update: [slevomat/coding-standard](https://github.com/slevomat/coding-standard).


Updates `slevomat/coding-standard` from 8.15.0 to 8.16.0
- [Release notes](https://github.com/slevomat/coding-standard/releases)
- [Commits](slevomat/coding-standard@8.15.0...8.16.0)

---
updated-dependencies:
- dependency-name: slevomat/coding-standard
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: dev-dependencies
...

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

Author: dependabot[bot]