Docs: Update avro4k link (#2652)

Author: Chuckame

formats/README.md

@@ -18,7 +18,7 @@ For convenience, they have same `groupId`, versioning and release cycle as core
 
 | Format                   | GitHub repo and Artifact                                                                                                                                 | Platform                | Notes                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
 |--------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
-| Avro                     | [sksamuel/avro4k](https://github.com/sksamuel/avro4k) <br> `com.sksamuel.avro4k:avro4k`                                                                  | JVM only                | This library allows serialization and deserialization of objects to and from [Avro](https://avro.apache.org). It will read and write from Avro binary or json streams or generate Avro Generic Records directly. It will also generate Avro schemas from data classes. The library allows for easy extension and overrides for custom schema formats, compatiblity with schemas defined outside out of the JVM and for types not supported out of the box. |
+| Avro                     | [avro-kotlin/avro4k](https://github.com/avro-kotlin/avro4k) <br> `com.github.avro-kotlin.avro4k:avro4k-core`                                                                  | JVM only                | This library allows serialization and deserialization of objects to and from [Avro](https://avro.apache.org). It will read and write from Avro binary or json streams or generate Avro Generic Records directly. It will also generate Avro schemas from data classes. The library allows for easy extension and overrides for custom schema formats, compatiblity with schemas defined outside out of the JVM and for types not supported out of the box. |
 | Bson                     | [jershell/kbson](https://github.com/jershell/kbson) <br> `com.github.jershell:kbson`                                                                     | JVM only                | Allows serialization and deserialization of objects to and from [BSON](https://docs.mongodb.com/manual/reference/bson-types/).                                                                                                                                                                                                                                                                                                                             |
 | TOML                     | [Peanuuutz/tomlkt](https://github.com/Peanuuutz/tomlkt) <br> `net.peanuuutz.tomlkt:tomlkt`                                                               | all supported platforms | Multiplatform encoder and decoder for [TOML](http://toml.io/) 1.0.0 compliant. This library aims to provide similar API to the official JSON format (such as TomlLiteral, TomlTable), while adding TOML specific features (such as @TomlComment, @TomlMultilineString).                                                                                                                                                                                    |
 | TOML                     | [akuleshov7/ktoml](https://github.com/akuleshov7/ktoml) <br> `com.akuleshov7:ktoml-core`                                                                 | all supported platforms | Fully Native and Multiplatform Kotlin serialization library for serialization/deserialization of TOML format. This library contains no Java code and no Java dependencies and it implements multiplatform parser, decoder and encoder of TOML.                                                                                                                                                                                                             |