chore(deps-dev): bump codeigniter/coding-standard from 1.7.16 to 1.8.1

Bumps [codeigniter/coding-standard](https://github.com/CodeIgniter/coding-standard) from 1.7.16 to 1.8.1.
- [Release notes](https://github.com/CodeIgniter/coding-standard/releases)
- [Changelog](https://github.com/CodeIgniter/coding-standard/blob/develop/CHANGELOG.md)
- [Commits](CodeIgniter/coding-standard@v1.7.16...v1.8.1)

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

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

composer.json

@@ -32,7 +32,7 @@
         "psr/container": "^2.0"
     },
     "require-dev": {
-        "codeigniter/coding-standard": "1.7.*",
+        "codeigniter/coding-standard": "1.8.*",
         "codeigniter4/devkit": "^1.0",
         "phpunit/phpunit": "^9.6",
         "tatter/patches": "^2.0"