[Doc] Add apollo-kotlin-java-support to Galaxy page (#6041)

Author: BoD

docs/source/advanced/galaxy.mdx

@@ -18,5 +18,6 @@ The Apollo Kotlin galaxy projects all start with `apollo-kotlin`:
 | [apollo-kotlin-compose-support](https://github.com/apollographql/apollo-kotlin-compose-support)                         | Compose support for Apollo Kotlin                            |
 | [apollo-kotlin-cli](https://github.com/apollographql/apollo-kotlin-cli)                                                 | Command line tool for your GraphQL projects                  |
 | [apollo-kotlin-mockserver](https://github.com/apollographql/apollo-kotlin-mockserver)                                   | KMP ready HTTP mock server                                   |
+| [apollo-kotlin-java-support](https://github.com/apollographql/apollo-java-support)                                      | Java language support for Apollo Kotlin                      |
 
-When possible, file issues in the appropriate repository. 
+When possible, file issues in the appropriate repository.