build(deps-dev): update phpstan/phpstan requirement (#1883)

Updates the requirements on [phpstan/phpstan](https://github.com/phpstan/phpstan) to permit the latest version.
- [Release notes](https://github.com/phpstan/phpstan/releases)
- [Changelog](https://github.com/phpstan/phpstan/blob/1.12.x/CHANGELOG.md)
- [Commits](phpstan/phpstan@1.11.5...1.11.8)

---
updated-dependencies:
- dependency-name: phpstan/phpstan
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

composer.json

@@ -81,7 +81,7 @@
 	"require-dev": {
 		"fig-r/psr2r-sniffer": "2.1.0",
 		"overtrue/phplint": "9.3.1",
-		"phpstan/phpstan": "1.11.5",
+		"phpstan/phpstan": "1.11.8",
 		"phpunit/phpunit": "10.5.24",
 		"phpunit/php-code-coverage": "10.1.14",
 		"rector/rector": "0.15.13",