Drive-by fix: For JSON, it's illegal to have an \' escape sequence in a
double quote (") string literal.

Bug: v8:8880
Change-Id: I16de0ee731e93f5ea0db8f743c9b363a6bf50a43
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1631599
Auto-Submit: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Simon Zünd <szuend@chromium.org>
Reviewed-by: Simon Zünd <szuend@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61868}