Regenerate mise.lock with java platform URLs

mise-action 4.1.0 automatically runs `mise install --locked` when a
mise.lock is present. The locked install fails because the lock file
lacked platform URL and checksum entries for java:

    No lockfile URL found for java@26.0.1 on platform linux-x64
    (--locked mode)

Regenerate the lock file with `mise lock` to add them.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: horgh