Update dock.mau.dev/mautrix/signal Docker tag to v0.6.1

[renovate]

This PR contains the following updates:

Package	Update	Change
dock.mau.dev/mautrix/signal	minor	v0.4.3 -> v0.6.1

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Release Notes

mautrix/signal (dock.mau.dev/mautrix/signal)

v0.6.1

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• Added support for bridging location messages from Matrix to Signal
  (thanks to [@​maltee1] in #​504).
  • Note that Signal doesn't support real location messages, so they're just
    bridged as links. The link template is configurable.
• Fixed bridging long text messages from Signal
  (thanks to [@​maltee1] in #​506).
• Improved handling of ping timeouts in Signal websocket.

v0.6.0

Compare Source

• Updated to libsignal v0.44.0.
• Refactored bridge to support Signal's new phone number identifier (PNI)
  system in order to fix starting new chats and receiving messages from new
  users.
  • When starting a chat with a user you haven't talked to before, the portal
    room will not have a ghost user for the recipient until they accept the
    message request.
• Added support for syncing existing groups on login instead of having to wait
  for new messages.
• Added notices if decrypting incoming message from Signal fails.
• Added bridging of group metadata from Matrix to Signal
  (thanks to [@​maltee1] in #​461).
• Added command to create new Signal group for Matrix room
  (thanks to [@​maltee1] in #​461 and #​491).
• Added commands for inviting users to Signal groups by phone number
  (thanks to [@​maltee1] in #​495).
• Improved handling of missed Signal group metadata changes
  (thanks to [@​maltee1] in #​488).

v0.5.1

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• Updated to libsignal v0.41.0.
• Fixed sending messages to groups.
• Fixed some cases of ghost user info changing repeatedly on multi-user
  instances.
• Fixed migrating SQLite databases from Python version.

v0.5.0

Compare Source

• Rewrote bridge in Go.
  • To migrate the bridge, simply upgrade in-place. The database and config
    will be migrated automatically, although some parts of the config aren't
    migrated (e.g. log config). If you prevented the bridge from writing to
    the config file, you'll have to temporarily allow it or update it yourself.
  • The bridge doesn't use signald anymore, all users will have to re-link the
    bridge. signald can be deleted after upgrading.
  • Primary device mode is no longer supported, signal-cli is recommended if
    you don't want to use the official Signal mobile apps.
  • Some old features are not yet supported (e.g. group management features).
• Renamed main branch from master to main.
• Added support for edits and message formatting.

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