Fixed some typos and links for javadoc, and some refactoring (#4755)

src/main/java/com/thealgorithms/conversions/AnyBaseToDecimal.java

@@ -1,7 +1,7 @@
 package com.thealgorithms.conversions;
 
 /**
- * @author Varun Upadhyay (https://github.com/varunu28)
+ * @author Varun Upadhyay (<a href="https://github.com/varunu28">...</a>)
  */
 // Driver program
 public class AnyBaseToDecimal {

src/main/java/com/thealgorithms/conversions/DecimalToAnyBase.java

@@ -5,7 +5,7 @@ import java.io.InputStreamReader;
 import java.util.ArrayList;
 
 /**
- * @author Varun Upadhyay (https://github.com/varunu28)
+ * @author Varun Upadhyay (<a href="https://github.com/varunu28">...</a>)
  */
 // Driver Program
 public class DecimalToAnyBase {

src/main/java/com/thealgorithms/conversions/RgbHsvConversion.java

@@ -10,8 +10,8 @@ import java.util.Arrays;
  * models how colors appear under light. In it, colors are represented using
  * three components: hue, saturation and (brightness-)value. This class provides
  * methods for converting colors from one representation to the other.
- * (description adapted from https://en.wikipedia.org/wiki/RGB_color_model and
- * https://en.wikipedia.org/wiki/HSL_and_HSV).
+ * (description adapted from <a href="https://en.wikipedia.org/wiki/RGB_color_model">[1]</a> and
+ * <a href="https://en.wikipedia.org/wiki/HSL_and_HSV">[2]</a>).
  */
 public class RgbHsvConversion {