GH Actions publish-engines: Surface npm package version

[janpio]

In https://github.com/prisma/engines-wrapper/blob/main/.github/workflows/publish-engines.yml we receive a payload, and use that to update a dependency in this repo, then publish a new version to Npm. That Npm package version is not really visible here, but would make it easier to find stuff when debugging problems.

Possibilities:

• Tag commit with Npm version (after it was actually published)
• Add npm version to commit message (before the publish happened)
• ...