ci: Allow to use Craft's new auto-versioning

[sentrivana]

Description

Craft will support automatic versioning based on commit messages from version 2.14.0, so that you can just put "auto" (or "major", "minor", "patch") as the version to release and it'll determine the rest. It's not out yet, but preparing for once it is.

Issues

Reminders

• Please add tests to validate your changes, and lint your code using tox -e linters.
• Add GH Issue ID & Linear ID (if applicable)
• PR title should use conventional commit style (feat:, fix:, ref:, meta:)
• For external contributors: CONTRIBUTING.md, Sentry SDK development docs, Discord community