resolved errorin binary tree remove method

Author: Darshan-Baligeri

src/main/java/com/thealgorithms/datastructures/trees/BinaryTree.java

@@ -137,6 +137,7 @@ else if (temp.left != null && temp.right != null) {
             }
         }
 
+        // Decrement size after successful removal
         size--;
         return true;
     }