Fix server functions page crash from stale code highlight

[MaxwellCohen]

Summary

• Fixes a crash on /reference/rsc/server-functions where CodeBlock threw Could not find: 'submitAction' while resolving inline highlights.
• Updates the highlight meta from line 23 → 25 after a recent update wrapped post-await setState calls in a nested startTransition, shifting <form action={submitAction}> down two lines.

Before

After

Test plan

• Open http://localhost:3000/reference/rsc/server-functions or https://react-pcy5p89jo-react-foundation.vercel.app/reference/rsc/server-functions
• Confirm the page renders without the Could not find: 'submitAction' error
• Confirm the numbered callouts still highlight updateName and submitAction in the “Server Functions with Actions” example

Fixes: #8523

Made with Cursor

[github-actions]

Size changes

Details

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