Fix link to maubot docs in README

Borg backup provide ssh key example format

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/1965

Update configuring-well-known.md

Upgrade heisenbridge 1.13.0 1.13.1

Update Grafana 9.0.3 -> 9.0.4

Add matrix-registreation-bot docker image

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/1894

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/1894

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/1894

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/1894

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/1894

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/1894

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/1894

Because the configuration file is now mounted as readonly and maubot tries to update it on start,
we get this warning:
> Failed to create tempfile to write updated config to disk: [Errno 30] Read-only file system: '/config/tmpfa8vcb3y.yaml'

It doesn't seem to cause issues though.

Because the configuration is no longer overwritten on every bot start, each
next Ansible run should no longer overwrite it again and report a
"changed" task.

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/1894

* Make interface hidden behind proxy by default

* Remove expose option and replace with http_bind_port

Reasoning: This is a similar binary trigger but allows to bin not on all interfaces

* Clarify maubot admin purpose

* Remove unnecessary edif

* Extend docs to prevent common misconceptions

* Make http_bind_port singular, do not allow multiple values

* Make optional again

Maubot moanos

This reverts commit 65bfc1396e.

The 1.8.1 image is published now, so we can finally upgrade.

Reasoning: setup_install.yml only runs on --tags=setup-all or on --tags=setup-bot-maubot.

If --tags=setup-nginx-proxy or similar commands are run, setup_install.yml will not run and the nginx configuration will be incomplete.

Fix self-build error image names

Make use of `example.com` more consistent (replace `DOMAIN`) and simplify Caddy 2 config. Remove Caddy 1 config since Caddy 1 is long past EOL.

Explicitly mention that your homeserver's domain is included in telemetry

Update Coturn 4.5.2-r12 -> 4.5.2-r13

Update telemetry documentation to more closely match upstream

**no docker tag yet**, [keep an eye on it](https://hub.docker.com/r/coturn/coturn/tags?page=1&name=4.5.2-r13)

Synapse no longer describes the stats as anonymized since the `server_name` is included.
https://github.com/matrix-org/synapse/pull/13321

This reverts commit 05ccee9f6f.

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/1952