Chore(deps-dev): Update symfony/event-dispatcher requirement

Updates the requirements on [symfony/event-dispatcher](https://github.com/symfony/event-dispatcher) to permit the latest version.
- [Release notes](https://github.com/symfony/event-dispatcher/releases)
- [Changelog](https://github.com/symfony/event-dispatcher/blob/7.3/CHANGELOG.md)
- [Commits](symfony/event-dispatcher@v5.4.0...v7.3.0)

---
updated-dependencies:
- dependency-name: symfony/event-dispatcher
  dependency-version: 7.3.0
  dependency-type: direct:development
...

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

Author: dependabot[bot]

tests/integration/composer.json

@@ -5,7 +5,7 @@
         "guzzlehttp/guzzle": "7.9.2",
         "jarnaiz/behat-junit-formatter": "^1.3",
         "sabre/dav": "4.7.0",
-        "symfony/event-dispatcher": "~5.4"
+        "symfony/event-dispatcher": "~7.3"
     },
     "autoload": {
         "psr-0": {