fix: no underscore, synapse doesn't like it

compose.telegram.yml

@@ -9,7 +9,7 @@ services:
     volumes:
       - telegram-data:/telegram-data
 
-  telegram_bridge:
+  telegrambridge:
     image: dock.mau.dev/mautrix/telegram:1f5b91cbec7866663d8dd8f4c9a62115e2905552-amd64
     depends_on:
       - telegram_db
@@ -36,7 +36,7 @@ services:
     networks:
       - internal
 
-  telegram_db:
+  telegramdb:
     image: postgres:13-alpine
     secrets:
       - telegram_db_password