Bugfix: Bump reva to 2.16.1

*   Bugfix [cs3org/reva#4194](https://github.com/cs3org/reva/pull/4194): Make appctx package compatible with go v1.21
*   Bugfix [cs3org/reva#4214](https://github.com/cs3org/reva/pull/4214): Always pass adjusted default nats options

https://github.com/owncloud/ocis/pull/7350