docs: fix TableView empty state example dropping TableBody tag (#10233)
The empty state example for S2 TableView had two `- begin highlight -`
markers around a single block (one before `<TableBody>` and a second,
redundant one inside the opening tag) but only one `- end highlight -`.
The code highlighter in `Code.tsx` (`lines()`) starts a new highlight
grouping on each `begin` marker and resets the current line, with no
guard for an already-open grouping. The second `begin` therefore
discarded the already-accumulated `<TableBody` line, so the rendered
example (and the StackBlitz/copy/download export, which reads the same
rendered code) was missing the `<TableBody>` opening tag, producing
invalid JSX.
Removing the redundant inner marker leaves the canonical single
begin/end pair so the full `<TableBody ... renderEmptyState>` tag renders
and the example compiles in StackBlitz.
Closes #10231
Co-authored-by: Patrick Wehbe <patrick.wehbe.applications@gmail.com>