2.5.2-pre.53adfaf Version Bump - #395

Closing — this bump is wrong and would regress the version on main.

Version.swift is currently 3.0.0-pre; this PR would set it back to 2.5.2-pre.53adfaf.

Cause: the tag 3.0.0rc1 is not valid semver (semver requires 3.0.0-rc1, with a hyphen), so reecetech/version-increment could not parse it, fell back to the last parseable tag 2.5.1, and incremented that.

The bump_version job should not run for prereleases at all — bumping the version after a release candidate makes no sense regardless of parsing. Fixing that now.