Update README

README.md

@@ -4,8 +4,7 @@ Docker images for building `iced` applications.
 These images can be used together with [`cross`] for cross-compilation to different
 targets (e.g. Raspberry Pi).
 
-## Docker Hub
-The Docker images are available in Docker Hub in [the `icedrs/iced` repository].
+## GitHub Container Registry
+The Docker images are readily available in [the GitHub Container Registry of the `iced-rs` organization](https://github.com/orgs/iced-rs/packages).
 
 [`cross`]: https://github.com/rust-embedded/cross
-[the `icedrs/iced` repository]: https://hub.docker.com/repository/docker/icedrs/iced/general