code_style: run dotnet format to fix ci warnings

Signed-off-by: leo <longshuang@msn.cn>

Author: love-linger

src/Models/DateTimeFormat.cs

@@ -74,4 +74,4 @@ public static string Format(DateTime localTime, bool dateOnly = false)
             return localTime.ToString(format, _culture);
         }
     }
-}
+}