Add integration_type service to github (home-assistant#159032)

Author: joostlek

homeassistant/components/github/manifest.json

@@ -4,6 +4,7 @@
   "codeowners": ["@timmo001", "@ludeeus"],
   "config_flow": true,
   "documentation": "https://www.home-assistant.io/integrations/github",
+  "integration_type": "service",
   "iot_class": "cloud_polling",
   "loggers": ["aiogithubapi"],
   "requirements": ["aiogithubapi==24.6.0"]

homeassistant/generated/integrations.json

@@ -2362,7 +2362,7 @@
     },
     "github": {
       "name": "GitHub",
-      "integration_type": "hub",
+      "integration_type": "service",
       "config_flow": true,
       "iot_class": "cloud_polling"
     },