修复时间格式错误

src/Hotline/Settings/TimeLimitDomain/ExpireTimeLimitBase.cs

@@ -105,7 +105,7 @@ public abstract class ExpireTimeLimitBase
 		    {
 			    date = date.AddDays(1);
 		    }
-			date = DateTime.Parse(date.ToShortDateString() + "18:00");
+			date = DateTime.Parse(date.ToShortDateString() + " 18:00");
 		}
 	    return date;
     }