chore(build-classifier): bump to v1.0.2 + maybeInstallable filename fix

Pulls in webinstall/webi-build-classifier#21 (merged 2026-05-07,
SHA 574eff5) and the host-target x64/win32 fix from #20 (SHA 71c0768)
that landed alongside it.

#21 fixes `maybeInstallable` rejecting any package version ending in
`.1` whose download URL is a GitHub source-archive endpoint
(`/tarball/vX.Y.1` or `/zipball/vX.Y.1`). Without it, this PR's
`_enumerateTriplets` priority fix is undermined: even after picking
the correct posix_2017 triplet, the newest version (e.g. serviceman
v1.0.1) is silently dropped by the classifier and the resolver falls
back to v1.0.0.

Confirmed on next.webi.sh after deploying this branch with the bumped
submodule: `serviceman@stable.sh` now resolves to v1.0.1/zip on macOS
arm64 (was v1.0.0/zip with the pre-rebase pre-fix submodule).

Author: coolaj86