chore(deps-dev): bump guzzlehttp/guzzle in /build/integration

Bumps [guzzlehttp/guzzle](https://github.com/guzzle/guzzle) from 7.6.1 to 7.8.0.
- [Release notes](https://github.com/guzzle/guzzle/releases)
- [Changelog](https://github.com/guzzle/guzzle/blob/7.8/CHANGELOG.md)
- [Commits](guzzle/guzzle@7.6.1...7.8.0)

---
updated-dependencies:
- dependency-name: guzzlehttp/guzzle
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

build/integration/composer.json

@@ -3,7 +3,7 @@
     "phpunit/phpunit": "^9",
     "dms/phpunit-arraysubset-asserts": "^0.5",
     "behat/behat": "~3.13.0",
-    "guzzlehttp/guzzle": "7.6.1",
+    "guzzlehttp/guzzle": "7.8.0",
     "jarnaiz/behat-junit-formatter": "^1.3",
     "sabre/dav": "4.4.0",
     "symfony/event-dispatcher": "~5.3"