update link

roles/matrix-bridge-mautrix-signal/templates/registration.yaml.j2

@@ -12,7 +12,7 @@ namespaces:
     - exclusive: true
       regex: '^#signal_.+:{{ matrix_mautrix_signal_homeserver_domain|regex_escape }}$'
 url: {{ matrix_mautrix_signal_appservice_address }}
-# See https://github.com/tulir/mautrix-signal/issues/43
+# See https://github.com/mautrix/signal/issues/43
 sender_localpart: _bot_{{ matrix_mautrix_signal_appservice_bot_username }}
 rate_limited: false
 de.sorunome.msc2409.push_ephemeral: true