build(deps-dev): update phpstan/phpstan-nette requirement (#624)

Updates the requirements on [phpstan/phpstan-nette](https://github.com/phpstan/phpstan-nette) to permit the latest version.
- [Release notes](https://github.com/phpstan/phpstan-nette/releases)
- [Commits](phpstan/phpstan-nette@1.2.3...1.2.9)

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

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

composer.json

@@ -35,7 +35,7 @@
 		"phpstan/extension-installer": "1.3.0",
 		"phpstan/phpstan": "1.10.14",
 		"phpstan/phpstan-deprecation-rules": "1.1.3",
-		"phpstan/phpstan-nette": "1.2.3",
+		"phpstan/phpstan-nette": "1.2.9",
 		"phpstan/phpstan-mockery": "1.1.1",
 		"phpstan/phpstan-strict-rules": "1.4.5",
 		"nextras/multi-query-parser": "~1.0",