isim 0.30.0

What's Changed

• isim toolchain install: Debian 13 and other newer releases get swift.org's newest build of their family; a missing build is not retried (#643) by @kevinobruno in #644
• Release 0.30.0 by @github-actions[bot] in #645

Full Changelog: v0.29.0...v0.30.0