Chore(deps-dev): Bump guzzlehttp/guzzle in /tests/integration

Bumps [guzzlehttp/guzzle](https://github.com/guzzle/guzzle) from 7.13.2 to 7.15.1.
- [Release notes](https://github.com/guzzle/guzzle/releases)
- [Changelog](https://github.com/guzzle/guzzle/blob/8.0/CHANGELOG.md)
- [Commits](guzzle/guzzle@7.13.2...7.15.1)

---
updated-dependencies:
- dependency-name: guzzlehttp/guzzle
  dependency-version: 7.15.1
  dependency-type: direct:development
...

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

Author: dependabot[bot]

tests/integration/composer.json

@@ -2,7 +2,7 @@
     "require-dev": {
         "phpunit/phpunit": "~13",
         "behat/behat": "~3.32.0",
-        "guzzlehttp/guzzle": "7.13.2",
+        "guzzlehttp/guzzle": "7.15.1",
         "jarnaiz/behat-junit-formatter": "^1.3",
         "sabre/dav": "4.7.1",
         "symfony/event-dispatcher": "~5.4"