fix: regenerate extended_runtime fixture Cargo.lock

The lockfile was stale after rebasing onto main (hyperlight-core 0.15.0,
rquickjs 0.12.0, etc). CI failed with --locked because the lock needed
updating.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Signed-off-by: Simon Davies <simongdavies@users.noreply.github.com>

Author: simongdavies