One of the TODO lefts in the already huge #3003.

What we need?

1. a file .github/workflows/cargo-semver-version similar to nightly-version that tracks the pinned version of cargo-semver-checks.
2. a weekly cron-weekly-update-cargo-semver-checks.yml that checks if we need to update cargo-semver-checks and makes a PR (similar to other cron-*.yml jobs)

Some ideas:

• We can try to get some information of the latest version with https://github.com/obi1kenobi/cargo-semver-checks/releases/latest
• We can also try to use the crates.io API (my preferred way).