Core/Conf: Update MaxPlayerLevel 60 > 70

Port From (https://github.com/TrinityCore/TrinityCore/commit/492fbd38f1b41680cb9034ed9ca66a19ba51d9f4)

Source/Framework/Constants/SharedConst.cs

@@ -34,7 +34,7 @@ namespace Framework.Constants
         public const int MaxHolidayDurations = 10;
         public const int MaxHolidayDates = 26;
         public const int MaxHolidayFlags = 10;
-        public const int DefaultMaxLevel = 60;
+        public const int DefaultMaxLevel = 70;
         public const int MaxLevel = 123;
         public const int StrongMaxLevel = 255;
         public const int MaxOverrideSpell = 10;

Source/WorldServer/WorldServer.conf.dist

@@ -860,9 +860,9 @@ SkipCinematics = 0
 #        Description: Maximum level that can be reached by players.
 #        Important:   Levels beyond 110 are not recommended at all.
 #        Range:       1-255
-#        Default:     60
+#        Default:     70
 
-MaxPlayerLevel = 60
+MaxPlayerLevel = 70
 
 #
 #    MinDualSpecLevel