Update README.md

Author: mpilquist

README.md

@@ -1,5 +1,6 @@
 [![Discord](https://img.shields.io/discord/632277896739946517.svg?label=&logo=discord&logoColor=ffffff&color=404244&labelColor=6A7EC2)](https://discord.gg/wKn3cpfRVz)
-[![Maven Central](https://img.shields.io/maven-central/v/org.scodec/scodec-bits_2.13)](https://maven-badges.herokuapp.com/maven-central/org.scodec/scodec-bits_2.13)
+[![Maven Central](https://img.shields.io/maven-central/v/org.scodec/scodec-bits_3)](https://maven-badges.herokuapp.com/maven-central/org.scodec/scodec-bits_3)
+[![javadoc](https://javadoc.io/badge2/org.scodec/scodec-bits_3/javadoc.svg)](https://javadoc.io/doc/org.scodec/scodec-bits_3)
 
 scodec-bits
 ===========
@@ -43,7 +44,7 @@ Base conversions to and from strings are supported. Binary, hexadecimal, and bas
 supported. Each have a default alphabet but support alternative alphabets as well as user defined
 alphabets.
 
-For more information, see the [API documentation](http://scodec.org/api/).
+For more information, see the [API documentation](https://javadoc.io/doc/org.scodec/scodec-bits_3).
 
 For a combinator based approach to encoding values to/from binary, see the companion project [scodec](https://github.com/scodec/scodec).