fix: add missing generic keys

Author: raphael-goetz

definitions/standard/data_type/object/http_request.proto.json

@@ -66,5 +66,5 @@
 			}
 		}
 	],
-	"genericKeys": []
+	"genericKeys": ["O"]
 }

definitions/standard/data_type/object/http_response.proto.json

@@ -50,5 +50,7 @@
 			}
 		}
 	],
-	"genericKeys": []
+	"genericKeys": [
+		"O"
+	]
 }