Regression since db54063a0c

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/4617

Builds up on top of d0adc8a374

This was an upstream documentation mistake that propagated to us
during the update in 25e7cac28d.

The upstream fix is here:

- 8f7f4d1dd1
- https://github.com/metio/matrix-alertmanager-receiver/pull/99

Ref:

- https://github.com/element-hq/element-web/pull/30681
- https://github.com/element-hq/element-web/pull/30702

All other mautrix bridges already had `--no-update`.
For some reason, these 2 didn't.

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/4585

Ref:

- https://github.com/metio/matrix-alertmanager-receiver/releases/tag/2025.9.17
- https://github.com/metio/matrix-alertmanager-receiver/pull/94

Both container images provide the same version (v0.1.4) of the upstream software
(https://github.com/matrix-org/rust-synapse-compress-state).

The new container image is also available multiarch and is available for `arm64`,
removing the need to self-build on this architecture.

* Documentation update

* New files for role

* Update existing files to add support for matrix-steam-bridge

* Typos and misc fixes

* Change docker tag to latest until version # is stable

* Align bridge permissions

* Correct user localpart

* Remove trailing +

* Fix syslog identifier

* Actually enable the service correctly

* One more typo fix

* Third time's the charm

* Fix config file paths

* Fix config after bridge repo changes

* Add default appservice public address - set public_media to false by default for testing

* Fix default config for steamkit-service path

* Fix bluesky reference

* Fix default container path

* Fix appservice connection to http for internal, change port to standard 8080

* Fix appservice port

* Enable public_media by default, add labels

* Enable public_media by default, add labels

* Allow bridge to update its own config and generate public_media signing key

* Add deterministic public_media_signing_key, expose portal cleanup

* Change default public_media path to omit `matrix.` from the path as it has been found that URLs generated by the bridge will only match {{ matrix_domain }}

* Remove domain re-write

* Revert "Change default public_media path to omit `matrix.` from the path as it has been found that URLs generated by the bridge will only match {{ matrix_domain }}"

This reverts commit 5f399effb9.

* Fix TLS label if playbook TLS is disabled

* Match default bridge TLS config

* Related to 3daf14d69 and 60ab08014 which enable async media by default for mautrix-go bridges

* Adjust matrix-bridge-steam files to add new line at the end of files

* Pin matrix-bridge-steam (latest -> 1.0.3)

---------

Co-authored-by: Slavi Pantaleev <slavi@devture.com>