Set Matter integration type to "hub" (home-assistant#157657)

Author: TheJulianJES

homeassistant/components/matter/manifest.json

@@ -6,6 +6,7 @@
   "config_flow": true,
   "dependencies": ["websocket_api"],
   "documentation": "https://www.home-assistant.io/integrations/matter",
+  "integration_type": "hub",
   "iot_class": "local_push",
   "requirements": ["python-matter-server==8.1.0"],
   "zeroconf": ["_matter._tcp.local.", "_matterc._udp.local."]