Fix Signald git repository to unbreak self-building

The maunium fork of Signald is no longer up-to-date (does not publish
0.18.0.. at least not yet) and all the necessary changes are now upstream.

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/1775

roles/matrix-bridge-mautrix-signal/defaults/main.yml

@@ -15,7 +15,7 @@ matrix_mautrix_signal_docker_image: "dock.mau.dev/mautrix/signal:{{ matrix_mautr
 matrix_mautrix_signal_docker_image_force_pull: "{{ matrix_mautrix_signal_docker_image.endswith(':latest') }}"
 
 matrix_mautrix_signal_daemon_container_image_self_build: false
-matrix_mautrix_signal_daemon_docker_repo: "https://mau.dev/maunium/signald.git"
+matrix_mautrix_signal_daemon_docker_repo: "https://gitlab.com/signald/signald"
 matrix_mautrix_signal_daemon_docker_src_files_path: "{{ matrix_base_data_path }}/mautrix-signald/docker-src"
 
 matrix_mautrix_signal_daemon_docker_image: "docker.io/signald/signald:{{ matrix_mautrix_signal_daemon_docker_image_tag }}"