crate-ci/typos renamed its default branch from master to main on
2026-09-18 (0a3d75e) and the master branch is gone, so every workflow
run since then fails at job setup with:
Unable to resolve action `crate-ci/typos@master`, unable to find version `master`
Pin to the latest release tag instead of tracking a branch. This matches
how the other actions in these two workflows are referenced and keeps the
check reproducible.
Signed-off-by: Dennis Zhuang <killme2008@gmail.com>