Update Solution.java

Author: javadev

src/main/java/g2501_2600/s2553_separate_the_digits_in_an_array/Solution.java

@@ -2,7 +2,7 @@
 
 // #Easy #Array #Simulation #2023_08_18_Time_3_ms_(92.00%)_Space_43.7_MB_(93.70%)
 
-class Solution {
+public class Solution {
     public int[] separateDigits(int[] nums) {
         StringBuilder str = new StringBuilder();
         for (int num : nums) {