Add contactPoint to extension.json

Author: jpmckinney

extension.json

@@ -16,5 +16,9 @@
   ],
   "schemas": [
     "release-schema.json"
-  ]
+  ],
+  "contactPoint": {
+    "name": "Open Contracting Partnership",
+    "email": "[email protected]"
+  }
 }