build(deps): Update league/openapi-psr7-validator requirement

Updates the requirements on [league/openapi-psr7-validator](https://github.com/thephpleague/openapi-psr7-validator) to permit the latest version.
- [Release notes](https://github.com/thephpleague/openapi-psr7-validator/releases)
- [Commits](thephpleague/openapi-psr7-validator@0.21...0.22)

---
updated-dependencies:
- dependency-name: league/openapi-psr7-validator
  dependency-type: direct:production
...

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

composer.json

@@ -19,7 +19,7 @@
   },
   "require": {
     "php": "^8.1",
-    "league/openapi-psr7-validator": "^0.21",
+    "league/openapi-psr7-validator": "^0.22",
     "nyholm/psr7": "^1.5",
     "symfony/browser-kit": "^5.4 || ^6.0 || ^7.0",
     "symfony/framework-bundle": "^5.4 || ^6.0 || ^7.0",