Fix incorrect test for sortedLastIndex snippet

test/sortedLastIndex/sortedLastIndex.js

@@ -1,6 +1,6 @@
 const sortedLastIndex = (arr, n) => {
 const isDescending = arr[0] > arr[arr.length - 1];
 const index = arr.reverse().findIndex(el => (isDescending ? n <= el : n >= el));
-return index === -1 ? 0 : arr.length - index - 1;
+return index === -1 ? 0 : arr.length - index;
 };
 module.exports = sortedLastIndex;