Use LnBinary instead of hardcoded /bin/ln in jvm.sh

[grihabor]

Fixes #21487

[cburroughs]

This looks reasonable to me. Just missing release notes.

[grihabor]

@cburroughs Yep, thanks, added notes

[grihabor]

Looks like some cache issue

native_engine.IntrinsicError: Could not identify a process to backtrack to for: Missing digest: Was not present in the local store: Digest { hash: Fingerprint<16a318523cf3dca456ce52b898eefc5de7a30469507ffba716a1d8d6d1ed8667>, size_bytes: 2302 }

[cburroughs]

Well that isn't good! But I see a couple of prior errors on main: Opened #21497

[grihabor]

Thank you!