Add frequent update for schema of compose.yaml

[Yovach]

Hi,
Currently, the compose.yaml schema is obsolete and not practical because the extension is dedicated to Docker and we don't have the latest features available.

I think it would be a good idea to automatically retrieve the schema from https://github.com/compose-spec/compose-spec/blob/main/schema/compose-spec.json because it will always be up to date (cf. https://compose-spec.io/).

Thanks for your work.

[bwateratmsft]

@Yovach are there specific things you're looking for? Also, do you have the YAML extension by Red Hat installed? (The Docker Compose language service automatically disables some redundant features in the presence of the YAML extension)

[Yovach]

Hi, yesterday I looked to use services[0].develop.watch but I couldn't find it in the autocomplete and I think the fact that the autocomplete is not updated frequently is annoying as a Docker Compose user. I hadn't installed the Red Hat YAML extension but I had to install it to get an updated compose.yaml schema.