automation: Update matrix-synapse Docker tag to v1.84.1

This MR contains the following updates:

Package	Update	Change
matrix-synapse	minor	1.81.0 -> 1.84.1

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Release Notes

matrix-org/synapse

v1.84.1

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This patch release fixes a major issue with homeservers that do not have an instance_map defined but which do use workers. If you have already upgraded to Synapse 1.84.0 and your homeserver is working normally, then there is no need to update to this patch release.

Bugfixes

• Fix a bug introduced in Synapse v1.84.0 where workers do not start up when no instance_map was provided. (#​15672)

Internal Changes

• Add dch and notify-send to the development Nix flake so that the release script can be used. (#​15673)

v1.84.0

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The worker_replication_* configuration settings have been deprecated in favour of configuring the main process consistently with other instances in the instance_map. The deprecated settings will be removed in Synapse v1.88.0, but changing your configuration in advance is recommended. See the upgrade notes for more information.

Bugfixes

• Fix a bug introduced in Synapse 1.84.0rc1 where errors during startup were not reported correctly on Python < 3.10. (#​15599)

v1.83.0

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No significant changes since 1.83.0rc1.

v1.82.0

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No significant changes since 1.82.0rc1.

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