build(deps-dev): update symfony/monolog-bundle requirement || ^4.0

Updates the requirements on [symfony/monolog-bundle](https://github.com/symfony/monolog-bundle) to permit the latest version.
- [Release notes](https://github.com/symfony/monolog-bundle/releases)
- [Changelog](https://github.com/symfony/monolog-bundle/blob/4.x/CHANGELOG.md)
- [Commits](symfony/monolog-bundle@v3.7.0...v4.0.0)

---
updated-dependencies:
- dependency-name: symfony/monolog-bundle
  dependency-version: 4.0.0
  dependency-type: direct:development
...

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

Author: dependabot[bot]

composer.json

@@ -41,7 +41,7 @@
     "squizlabs/php_codesniffer": "^4.0",
     "symfony/flex": "^2.3",
     "symfony/framework-bundle": "^7.3",
-    "symfony/monolog-bundle": "^3.7",
+    "symfony/monolog-bundle": "^3.7 || ^4.0",
     "symfony/phpunit-bridge": "^7.3"
   },
   "autoload": {