chore: ignore prereleases for auto update

[ ] I am happy with the code
[ ] Short description of the feature/issue is added in the pr description
[ ] PR is linked to the corresponding user story
[ ] Acceptance criteria are met
[ ] All open todos and follow ups are defined in a new ticket and justified
[ ] Deviations from the acceptance criteria and design are agreed with the PO and documented.
[ ] No debug or dead code
[ ] My code has no repetitions
[ ] Critical parts are tested automatically
[ ] Where possible E2E tests are implemented
[ ] Documentation/examples are up-to-date
[ ] All non-functional requirements are met
[ ] Functionality of the acceptance criteria is checked manually on the dev system.

zitadel / zitadel-go