(untested change, but unlikely to cause breakage)

Synapse v1.51.0 requires to be built with BuildKit since
https://github.com/matrix-org/synapse/pull/11691

The `docker_image` Ansible module does not support BuildKit
(https://github.com/ansible-collections/community.general/issues/514),
so we had to switch to a `docker build` call.

Update Synapse from 1.50.1 to 1.50.2

Fixes a issue with room version 1.

Merging has to wait until ARM images are built ofc.

Add missing slash in url scheme for mediaUrl

add etherpad to nginx wanted services

using b33ea48

it's required if enabled by the dimension config here:
6eb8fb8392/roles/matrix-etherpad/tasks/init.yml (L42-L49)

see also #1517

Updated: prom-postgres-exporter to v0.10.1

only enable openssl if necessary, closes #1510

matrix-bot-honoroit: bugfix commands in reply-to mode, add custom prefixes for thread topics

Upgrade synapse-simple-antispam (0.0.3 -> 0.0.7)

v1.50.0 was found to be buggy for people using a `webclient` listener.
This is fixed in v1.50.1.

We don't use such a listener, so we weren't affected anyway.

Updated: element-web to v1.9.9

Updated: Certbot to v1.22.0

Updated: mautrix-twitter to v0.1.3

Added: mautrix-whatsapp v0.2.3 tag

Added: mautrix-signal 0.2.2 & signald 0.16.1

Updated: telegram to v0.11.1

Updated Honoroit with fallback reply-to mode

Added Instagram version tag instead of latest

Updated: version to stable-6726-2

Updated: node-exporter to v1.3.1

Updated: slack to 1.10.0

Updated: sygnal to v0.11.0

Updated: webhooks image tag to v1.0.3-01

Updated: ddclient to v3.9.1-ls76

Updated: beeper-linkedin to v0.5.2