Fix typo in data-grid docs
Fix typo in data-grid docs

Bug: none
Change-Id: I45c146c93d8d05805b52ceb57f03cc7c7a2e5aa9
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2696647
Commit-Queue: Jack Franklin <993fcadce4d04090da2fefd557a0995e7966c8d5@chromium.org>
Commit-Queue: Simon Zünd <38944668e9e2ca98ccd0275b53370f90fa55c113@chromium.org>
Auto-Submit: Jack Franklin <993fcadce4d04090da2fefd557a0995e7966c8d5@chromium.org>
Reviewed-by: Simon Zünd <38944668e9e2ca98ccd0275b53370f90fa55c113@chromium.org>

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