chore: bump php-stubs/wordpress-stubs from 6.8.2 to 6.8.3

Bumps [php-stubs/wordpress-stubs](https://github.com/php-stubs/wordpress-stubs) from 6.8.2 to 6.8.3.
- [Release notes](https://github.com/php-stubs/wordpress-stubs/releases)
- [Commits](php-stubs/wordpress-stubs@v6.8.2...v6.8.3)

---
updated-dependencies:
- dependency-name: php-stubs/wordpress-stubs
  dependency-version: 6.8.3
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]