Update DIRECTORY.md

Author: DenizAltunkapan

DIRECTORY.md

@@ -304,6 +304,8 @@
           - 📄 [KadaneAlgorithm](src/main/java/com/thealgorithms/dynamicprogramming/KadaneAlgorithm.java)
           - 📄 [Knapsack](src/main/java/com/thealgorithms/dynamicprogramming/Knapsack.java)
           - 📄 [KnapsackMemoization](src/main/java/com/thealgorithms/dynamicprogramming/KnapsackMemoization.java)
+          - 📄 [KnapsackZeroOne](src/main/java/com/thealgorithms/dynamicprogramming/KnapsackZeroOne.java)
+          - 📄 [KnapsackZeroOneTabulation](src/main/java/com/thealgorithms/dynamicprogramming/KnapsackZeroOneTabulation.java)
           - 📄 [LevenshteinDistance](src/main/java/com/thealgorithms/dynamicprogramming/LevenshteinDistance.java)
           - 📄 [LongestAlternatingSubsequence](src/main/java/com/thealgorithms/dynamicprogramming/LongestAlternatingSubsequence.java)
           - 📄 [LongestArithmeticSubsequence](src/main/java/com/thealgorithms/dynamicprogramming/LongestArithmeticSubsequence.java)
@@ -1009,6 +1011,8 @@
           - 📄 [KadaneAlgorithmTest](src/test/java/com/thealgorithms/dynamicprogramming/KadaneAlgorithmTest.java)
           - 📄 [KnapsackMemoizationTest](src/test/java/com/thealgorithms/dynamicprogramming/KnapsackMemoizationTest.java)
           - 📄 [KnapsackTest](src/test/java/com/thealgorithms/dynamicprogramming/KnapsackTest.java)
+          - 📄 [KnapsackZeroOneTabulationTest](src/test/java/com/thealgorithms/dynamicprogramming/KnapsackZeroOneTabulationTest.java)
+          - 📄 [KnapsackZeroOneTest](src/test/java/com/thealgorithms/dynamicprogramming/KnapsackZeroOneTest.java)
           - 📄 [LevenshteinDistanceTests](src/test/java/com/thealgorithms/dynamicprogramming/LevenshteinDistanceTests.java)
           - 📄 [LongestAlternatingSubsequenceTest](src/test/java/com/thealgorithms/dynamicprogramming/LongestAlternatingSubsequenceTest.java)
           - 📄 [LongestArithmeticSubsequenceTest](src/test/java/com/thealgorithms/dynamicprogramming/LongestArithmeticSubsequenceTest.java)