style: enable InvalidJavadocPosition in checkstyle (#5237)

enable style InvalidJavadocPosition

Co-authored-by: Samuel Facchinello <samuel.facchinello@piksel.com>

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

@@ -1,12 +1,9 @@
-/**
- * Author : Siddhant Swarup Mallick
- * Github : https://github.com/siddhant2002
- */
-
-/** Program description - To find the FrizzyNumber*/
-
 package com.thealgorithms.maths;
 
+/**
+ * @author <a href="https://github.com/siddhant2002">Siddhant Swarup Mallick</a>
+ * Program description - To find the FrizzyNumber
+ */
 public final class FrizzyNumber {
     private FrizzyNumber() {
     }