Update legacy restic binaries with win7sup patch

Replace restic 0.18.1 legacy binaries built with standard go1.23.0
with new binaries built using go1.24.2-win7sup patched compiler.

This fixes restic crashes on Windows 7/Server 2008 R2 when using
VSS snapshots.

Built automatically via build-legacy-restic.yml workflow.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: iav