Change comment for CreatedAt

Author: molotkov-and

ydb/library/login/login.cpp

@@ -632,7 +632,6 @@ NLoginProto::TSecurityState TLoginProvider::GetSecurityState() const {
             for (const auto& subSid : sidInfo.Members) {
                 sid.AddMembers(subSid);
             }
-            // do not set CreatedAt. It does not need in describe result
             // no user hash here
         }
     }

ydb/library/login/login.h

@@ -145,7 +145,7 @@ class TLoginProvider {
         TString Name;
         TString Hash;
         std::unordered_set<TString> Members;
-        std::chrono::system_clock::time_point CreatedAt;
+        std::chrono::system_clock::time_point CreatedAt; // CreatedAt does not need in describe result. We will not add to security state
     };
 
     // our current audience (database name)