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 +23,8 @@
  */
 public final class Knapsack {
 
-    private Knapsack() { }
-
+    private Knapsack() {
+    }
     /**
      * Validates the input to ensure correct constraints.
      */