We need a note that deployment examples are for the amd64 platform only

We have dependencies in our deployment examples like `TIKA` or `bitnami` that **do not** have containers for the arm platform. You get this information right after when the container tries to start - and fails - which is quite frustrating to users. As example see: https://github.com/owncloud/ocis/pull/5637#issuecomment-1446077164 and our [admin documentation for search](https://doc.owncloud.com/ocis/next/conf-examples/search/configure-search.html). Note that this may also affect Mac users.

It seems that in some cirumstances, there is no container from an alternative source available which means that we have a limited number of choices, not exclusive:

* add a comment in the examples that the docker compose file is for the amd platform
* add a note that there is a binary alternative - if available like with TIKA
* suggest to create an own container for the target platform

I highly recommend to add the comment in any case as it is minimum effort.

@micbar @wkloucek @butonic @rhafer @ScharfViktor
(recommending to add this to the sprint / Infinite Scale Team Board)