fix typo in mjsunit expectations
fix typo in mjsunit expectations

TBR=machenbach@chromium.org

BUG=

Review URL: https://codereview.chromium.org/915113004

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#26600}

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh