Push this updated version to your users. The next update check will then go to the gallery.
Note that we don't yet support exporting keys, so once you host your extension on the gallery, you won't be able to easily return to self-hosting. We hope to support exporting extensions at some point in the future.
* We understand some of you may be reluctant to upload your key to Google. We are considering how to avoid this, but for now you should probably stick to self-hosting.