Simplify mediasoup supervisor label

         self.mediasoup_dir = self.run_dir / "media/chat/mediasoup-demo"
         self.certs_dir = self.run_dir / "certs"
         with self.supervisor("mediasoup") as config:
-            config["program:mediasoup_server"] = {
+            config["program:mediasoup"] = {
                 "autostart": "true",
                 "environment": (
                     f'MEDIASOUP_ANNOUNCED_IP="{self.address}",'