Fixed Lesson11.java and build is successful

Author: Ananatawa

lesson_11/arrays_java/arrays_app/src/main/java/com/codedifferently/lesson11/Lesson11.java

@@ -19,7 +19,7 @@ public int[] getConcatenation(int[] nums) {
       }
       return ans;
     }
-  }
+
   /**
    * Provide the solution to LeetCode 2942 here:
    * https://leetcode.com/problems/find-words-containing-character/
@@ -35,4 +35,4 @@ public List<Integer> findWordsContaining(String[] words, char x) {
 
       return result;
     }
-  }
+}