chore: update `next-config-js` document path

[JamBalaya56562]

Description

1. Update next-config-js path

Follow up #72465. Update next-config-js document URL.

2. Update turbo anchor path

At #70031, turbo docs was update. Then I update the reference path to it.

Before	After
https://nextjs.org/docs/app/api-reference/next-config-js	https://nextjs.org/docs/app/api-reference/config/next-config-js
https://nextjs.org/docs/app/api-reference/next-config-js/turbo#webpack-loaders	https://nextjs.org/docs/app/api-reference/next-config-js/turbopack#configuring-webpack-loaders

[vercel[bot]]

Notifying the following users due to files changed in this PR based on this repo's notify modifiers:

@timneutkens, @ijjk, @shuding, @huozhi:

packages/next/src/server/config.ts

[ijjk]

Allow CI Workflow Run

• [ ] approve CI run for commit: 188e1582423b27eb70357ca7e7e3dc3107d24d14

Note: this should only be enabled once the PR is ready to go and can only be enabled by a maintainer

[JamBalaya56562]

This PR also contains #77853 changes. Could someone review my PR?

[changeset-bot[bot]]

⚠️ No Changeset found

Latest commit: c26e56e839ff3330d61d5a47ede1f6ac537900ce

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[codspeed-hq[bot]]

CodSpeed Performance Report

Merging #73677 will create unknown performance changes

_{Comparing JamBalaya56562:next-config-js (750077d) with canary (4a3383a)}

Summary

⁉️ 9 dropped benchmarks

:warning: Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
⁉️	build[date-fns-all]	2.3 s	N/A	N/A
⁉️	build[date-fns-single]	1.4 s	N/A	N/A
⁉️	build[framer-motion-all]	3.2 s	N/A	N/A
⁉️	build[framer-motion-single]	2.3 s	N/A	N/A
⁉️	build[joy]	2.1 s	N/A	N/A
⁉️	build[lucide-react-all]	9.2 s	N/A	N/A
⁉️	build[lucide-react-single]	907.7 ms	N/A	N/A
⁉️	build[mui]	3.2 s	N/A	N/A
⁉️	build[shiki]	6.1 s	N/A	N/A

[JamBalaya56562]

@icyJoseph Could you review this PR?