fix: remove memory leak (#2532)

Co-authored-by: realstealthninja <68815218+realstealthninja@users.noreply.github.com>

sorting/library_sort.cpp

@@ -69,6 +69,11 @@ void librarySort(int *index, int n) {
             index_pos_for_output++;
         }
     }
+    delete[] numbered;
+    delete[] gaps;
+    for (int i = 0; i < 2; ++i) {
+        delete[] library[i];
+    }
 }
 
 int main() {