Bump doctrine/dbal in /sourcecode/apis/contentauthor

Bumps [doctrine/dbal](https://github.com/doctrine/dbal) from 2.13.9 to 3.6.6.
- [Release notes](https://github.com/doctrine/dbal/releases)
- [Upgrade guide](https://github.com/doctrine/dbal/blob/3.6.x/UPGRADE.md)
- [Commits](doctrine/dbal@2.13.9...3.6.6)

---
updated-dependencies:
- dependency-name: doctrine/dbal
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

sourcecode/apis/contentauthor/composer.json

@@ -23,7 +23,7 @@
         "cerpus/version-client": "^1.3",
         "ckeditor/ckeditor": "^4.5",
         "daniel-km/simple-iso-639-3": "^0.1.1",
-        "doctrine/dbal": "^2.5",
+        "doctrine/dbal": "^3.6",
         "embed/embed": "^3.2",
         "firebase/php-jwt": "^6.3",
         "guzzlehttp/guzzle": "^7.4",