Add one line installer Docker images sections in release notes

[jpraynaud]

Why

We want to provide some missing information in the release notes: an explanation of the one-line command installer and links to the Docker images.

What

Add new sections in the GitHub release note for unstable, pre-release and release.

How

• Add a 'Download a binary asset' section before the 'Verify the authenticity of an asset' section which uses the content of the dev blog post
• Replace the suffix of the Docker image tag to use the GitHub short commit sha (replace sha in type=raw,value=${{ github.ref_name }}-{{sha}} with a computed value like for all others short sha in workflows) in all the workflows that use docker/metadata-action.
• Add a 'Download a Docker image' after the 'Verify the authenticity of an asset' section (create a table with 'image name' as the tag and a link to the Docker registry on GitHub)