Correct Javadoc return description for cylinder surface area

Fix Javadoc comment for surfaceAreaCylinder method.

Author: vardhan30016

src/main/java/com/thealgorithms/maths/Area.java

@@ -89,8 +89,7 @@ public static double surfaceAreaRectangle(final double length, final double widt
      *
      * @param radius radius of the floor
      * @param height height of the cylinder.
-     * @return volume of given cylinder
-     */
+surface area     */
     public static double surfaceAreaCylinder(final double radius, final double height) {
         if (radius <= 0) {
             throw new IllegalArgumentException(POSITIVE_RADIUS);