Update mautrix-telegram (0.4.0 -> 0.5.1)

roles/matrix-synapse/defaults/main.yml

@@ -209,7 +209,7 @@ matrix_synapse_self_check_validate_certificates: true
 # Enable telegram bridge
 matrix_mautrix_telegram_enabled: false
 
-matrix_mautrix_telegram_docker_image: "tulir/mautrix-telegram:v0.4.0"
+matrix_mautrix_telegram_docker_image: "tulir/mautrix-telegram:v0.5.1"
 
 matrix_mautrix_telegram_base_path: "{{ matrix_base_data_path }}/mautrix-telegram"