go: bump Go to 1.24.6 to resolve GO-2025-3849 on release/1.20.x#31453

ryancragun merged 1 commit intorelease/1.20.xhashicorp/vault:release/1.20.xfrom

ryan/bump-go-GO-2025-3849-1.20.xhashicorp/vault:ryan/bump-go-GO-2025-3849-1.20.xCopy head branch name to clipboard