[docs] Add iOS hydration mismatch details to error page

[josh-]

We recently ran into hydration mismatch errors on iOS, which we realised was due to iOS automatically converting what it thought were phone numbers into links.

We then found this GitHub issue, #38290, and thought it would be useful to add these details to the documentation page linked from the next.js error.

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Example from the linked issue:

Documentation / Examples

• Make sure the linting passes by running pnpm build && pnpm lint
• The "examples guidelines" are followed from our contributing doc

[timneutkens]

Thanks!