Update sabre/dav requirement from 3.2.2 to 3.2.3 in /build/integration

Updates the requirements on [sabre/dav](https://github.com/sabre-io/dav) to permit the latest version.
- [Release notes](https://github.com/sabre-io/dav/releases)
- [Changelog](https://github.com/sabre-io/dav/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sabre-io/dav/commits/3.2.3)

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

build/integration/composer.json

@@ -4,6 +4,6 @@
     "behat/behat": "~3.5.0",
     "guzzlehttp/guzzle": "6.3.3",
     "jarnaiz/behat-junit-formatter": "^1.3",
-    "sabre/dav": "3.2.2"
+    "sabre/dav": "3.2.3"
   }
 }