MS-463 Search timeout

Former-commit-id: 7fc8d310d4335f972e995dcf8009aef0854779a5

cpp/CHANGELOG.md

@@ -21,7 +21,7 @@ Please mark all change in change log and use the ticket from JIRA.
 - MS-449 - Add vectors twice success, once with ids, the other no ids
 - MS-461 - Mysql meta unittest failed
 - MS-462 - Run milvus server twices, should display error
-- MS-463 - Search timeout 
+- MS-463 - Search timeout
 
 ## Improvement
 - MS-327 - Clean code for milvus