Content Hub Adapter YouTube Update

The bundled plugin Content Hub Adapter Youtube has been updated to version 2.0.3. For details see the change log of the plugin at https://github.com/CoreMedia/content-hub-adapter-youtube/blob/v2.0.3/CHANGELOG.md. This includes updates of transitive dependencies used by the plugin, for example library google-oauth-client was updated to avoid security vulnerability CVE-2021-22573 that was reported for the previous version.

(CMS-21790)