Formatted Knapsack.java to pass linter and added 0/1 Knapsack algorithm

Author: Arpita01-work

src/main/java/com/thealgorithms/dynamicprogramming/Knapsack.java

@@ -23,8 +23,7 @@
  */
 public final class Knapsack {
 
-    private Knapsack() {
-    }
+    private Knapsack() {}
     /**
      * Validates the input to ensure correct constraints.
      */
@@ -65,13 +64,13 @@ public static int knapSack(final int weightCapacity, final int[] weights, final
 
     /**
      * Example main method for demonstration.
-     */
+    
     public static void main(String[] args) {
         int[] values = {60, 100, 120};
         int[] weights = {10, 20, 30};
         int weightCapacity = 50;
 
         int maxValue = knapSack(weightCapacity, weights, values);
         System.out.println("Maximum value = " + maxValue); // Output : 220
-    }
+    } */
 }