Make sure network.api_id is provided as an integer to mautrix-telegram

Otherwise "login phone" results in: "Failed to submit input: send code: rpc error code 400: API_ID_INVALID"

roles/custom/matrix-bridge-mautrix-telegram/templates/config.yaml.j2

@@ -2,7 +2,7 @@
 # Network-specific config options
 network:
     # Get your own API keys at https://my.telegram.org/apps
-    api_id: {{ matrix_mautrix_telegram_api_id | to_json }}
+    api_id: {{ matrix_mautrix_telegram_api_id | int | to_json }}
     api_hash: {{ matrix_mautrix_telegram_api_hash | to_json }}
 
     # Device info shown in the Telegram device list.