Fixed class names

QuestPDF/Elements/Table/TableLayoutPlanner.cs

@@ -5,7 +5,7 @@ using QuestPDF.Fluent;
 
 namespace QuestPDF.Elements.Table
 {
-    static class TableLayoutValidator
+    static class TableLayoutPlanner
     {
         public static void PlanCellPositions(this Table table)
         {

QuestPDF/Elements/Table/TableLayoutValidator.cs

@@ -6,7 +6,7 @@ using QuestPDF.Fluent;
 
 namespace QuestPDF.Elements.Table
 {
-    static class TableLayoutPlanner
+    static class TableLayoutValidator
     {
         public static void ValidateCellPositions(this Table table)
         {