[docs] Outdated ISR guide?

[cherniavskii]

Which project does this relate to?

Start

Describe the bug

I tried to implement ISG following the ISG guide, and it refers to prerender.routes option in tanstackStart() all the time:

import { tanstackStart } from '@tanstack/react-start/plugin/vite'
import { defineConfig } from 'vite'

export default defineConfig({
  plugins: [
    tanstackStart({
      prerender: {
        routes: ['/blog', '/blog/posts/*'],
        crawlLinks: true,
      },
    }),
  ],
})

This seems wrong, because prerender schema doesn't have a routes field:

router/packages/start-plugin-core/src/schema.ts

Lines 270 to 284 in 689d88e

	prerender: z
	.object({
	enabled: z.boolean().optional(),
	concurrency: z.number().optional(),
	filter: z
	.custom<
	(page: z.infer<typeof pageSchema>) => unknown
	>((value) => typeof value === 'function')
	.optional(),
	failOnError: z.boolean().optional(),
	autoStaticPathsDiscovery: z.boolean().optional(),
	maxRedirects: z.number().min(0).optional(),
	})
	.and(pagePrerenderOptionsSchema.optional())
	.optional(),

Should the ISG guide document the prerender.filter option instead?

Complete minimal reproducer

https://tanstack.com/start/latest/docs/framework/react/guide/isr

Steps to Reproduce the Bug

Check out the ISG Guide

Expected behavior

Correct configuration is documented

Screenshots or Videos

No response

Platform

N/A

Additional context

No response