composer(deps-dev): bump phpstan/phpstan-strict-rules

Bumps [phpstan/phpstan-strict-rules](/~https://github.com/phpstan/phpstan-strict-rules) from 0.12.8 to 0.12.9.
- [Release notes](/~https://github.com/phpstan/phpstan-strict-rules/releases)
- [Commits](phpstan/phpstan-strict-rules@0.12.8...0.12.9)

Signed-off-by: dependabot[bot] <support@github.com>

composer.json

@@ -34,7 +34,7 @@
     "phpstan/phpstan": "~0.12.66",
     "phpstan/phpstan-deprecation-rules": "~0.12.6",
     "phpstan/phpstan-phpunit": "~0.12.17",
-    "phpstan/phpstan-strict-rules": "~0.12.8",
+    "phpstan/phpstan-strict-rules": "~0.12.9",
     "phpunit/phpunit": "^8.5.13",
     "psalm/plugin-phpunit": "~0.12.2",
     "symfony/filesystem": "^5.1.8",