Replace tabs to spaces to prevent problems in YAML

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

@@ -70,9 +70,9 @@ matrix_mautrix_signal_database_name: 'matrix_mautrix_signal'
 matrix_mautrix_signal_database_connection_string: 'postgres://{{ matrix_mautrix_signal_database_username }}:{{ matrix_mautrix_signal_database_password }}@{{ matrix_mautrix_signal_database_hostname }}:{{ matrix_mautrix_signal_database_port }}/{{ matrix_mautrix_signal_database_name }}'
 
 matrix_mautrix_signal_appservice_database: "{{
- 	{
- 		'postgres': matrix_mautrix_signal_database_connection_string,
- 	}[matrix_mautrix_signal_database_engine]
+  {
+    'postgres': matrix_mautrix_signal_database_connection_string,
+  }[matrix_mautrix_signal_database_engine]
  }}"
 
 # Can be set to enable automatic double-puppeting via Shared Secret Auth (https://github.com/devture/matrix-synapse-shared-secret-auth).