💚 Fix generating docs on publish

[coyotte508]

Fix updating docs on https://huggingface.co/docs/huggingface.js/index

The problem is that when publishing, the update to the package.json file does not trigger the documentation.yml workflow due to safeguards in github (triggering a workflow from another workflow)

So instead, we use repository_dispatch to trigger the doc build. It's better than triggering a doc build every commit :)

cc @mishig25 for visibility

[HuggingFaceDocBuilderDev]

The docs for this PR live here. All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.