fixed #266 ob_election_group_id.cpp with misspelled word (#410)

src/election/ob_election_group_id.cpp

@@ -29,7 +29,7 @@ int ObElectionGroupId::init(const ObAddr& server, const int64_t create_time)
   int ret = OB_SUCCESS;
   if (OB_INVALID_TIMESTAMP == create_time) {
     ret = OB_INVALID_ARGUMENT;
-    ELECT_ASYNC_LOG(WARN, "invalid arguemnt", K(ret), K(server), K(create_time));
+    ELECT_ASYNC_LOG(WARN, "invalid argument", K(ret), K(server), K(create_time));
   } else {
     server_ = server;
     create_time_ = create_time;