Update yiisoft/assets requirement from ^4.0 to ^5.1

Updates the requirements on [yiisoft/assets](https://github.com/yiisoft/assets) to permit the latest version.
- [Release notes](https://github.com/yiisoft/assets/releases)
- [Changelog](https://github.com/yiisoft/assets/blob/master/CHANGELOG.md)
- [Commits](yiisoft/assets@4.0.0...5.1.0)

---
updated-dependencies:
- dependency-name: yiisoft/assets
  dependency-type: direct:production
...

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

Author: dependabot[bot]

composer.json

@@ -56,7 +56,7 @@
         "symfony/console": "^6.0",
         "vlucas/phpdotenv": "^5.3",
         "yiisoft/aliases": "^3.0",
-        "yiisoft/assets": "^4.0",
+        "yiisoft/assets": "^5.1",
         "yiisoft/cache": "^3.0",
         "yiisoft/cache-file": "^3.0",
         "yiisoft/config": "^1.1",