Update directory

Author: siriak

DIRECTORY.md

@@ -520,6 +520,7 @@
             * [LowestBasePalindrome](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/others/LowestBasePalindrome.java)
             * [Luhn](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/others/Luhn.java)
             * [Mandelbrot](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/others/Mandelbrot.java)
+            * [MaximumSlidingWindow](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/others/MaximumSlidingWindow.java)
             * [MaximumSumOfDistinctSubarraysWithLengthK](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/others/MaximumSumOfDistinctSubarraysWithLengthK.java)
             * [MemoryManagementAlgorithms](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/others/MemoryManagementAlgorithms.java)
             * [MiniMaxAlgorithm](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/others/MiniMaxAlgorithm.java)
@@ -1151,6 +1152,7 @@
             * [LineSweepTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/others/LineSweepTest.java)
             * [LinkListSortTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/others/LinkListSortTest.java)
             * [LowestBasePalindromeTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/others/LowestBasePalindromeTest.java)
+            * [MaximumSlidingWindowTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/others/MaximumSlidingWindowTest.java)
             * [MaximumSumOfDistinctSubarraysWithLengthKTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/others/MaximumSumOfDistinctSubarraysWithLengthKTest.java)
             * [NewManShanksPrimeTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/others/NewManShanksPrimeTest.java)
             * [NextFitTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/others/NextFitTest.java)