variant.h: Update comments with numeric enum values

Comments got desynchronized with the actual values of the enum.
To avoid anyone making some stupid mistake here, let's fix it as soon
as possible.

core/variant.h

@@ -99,15 +99,15 @@ public:
 		_RID,
 		OBJECT,
 		DICTIONARY,
-		ARRAY, // 20
+		ARRAY,
 
 		// arrays
-		POOL_BYTE_ARRAY,
+		POOL_BYTE_ARRAY, // 20
 		POOL_INT_ARRAY,
 		POOL_REAL_ARRAY,
 		POOL_STRING_ARRAY,
-		POOL_VECTOR2_ARRAY, // 25
-		POOL_VECTOR3_ARRAY,
+		POOL_VECTOR2_ARRAY,
+		POOL_VECTOR3_ARRAY, // 25
 		POOL_COLOR_ARRAY,
 
 		VARIANT_MAX