Update readme.md

Author: javadev

src/main/java/g0001_0100/s0080_remove_duplicates_from_sorted_array_ii/readme.md

@@ -16,7 +16,9 @@ The judge will test your solution with the following code:
 
     int[] nums = [...]; // Input array
     int[] expectedNums = [...]; // The expected answer with correct length
+
     int k = removeDuplicates(nums); // Calls your implementation
+
     assert k == expectedNums.length;
     for (int i = 0; i < k; i++) {
         assert nums[i] == expectedNums[i];