Update simplesamlphp/xml-common requirement

Updates the requirements on [simplesamlphp/xml-common](https://github.com/simplesamlphp/xml-common) to permit the latest version.

Updates `simplesamlphp/xml-common` to 1.25.0
- [Release notes](https://github.com/simplesamlphp/xml-common/releases)
- [Commits](simplesamlphp/xml-common@v1.24.2...v1.25.0)

---
updated-dependencies:
- dependency-name: simplesamlphp/xml-common
  dependency-version: 1.25.0
  dependency-type: direct:production
  dependency-group: production-dependencies
...

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

Author: dependabot[bot]

composer.json

@@ -40,7 +40,7 @@
         "simplesamlphp/assert": "~1.8.1",
         "simplesamlphp/composer-module-installer": "~1.3.6",
         "simplesamlphp/simplesamlphp": "~2.4.0",
-        "simplesamlphp/xml-common": "~1.24.2",
+        "simplesamlphp/xml-common": "~1.25.0",
         "symfony/http-foundation": "~6.4.0",
         "symfony/var-exporter": "~6.4.0"
     },