Bump @types/node to 20.17.7 to fix findSourceMap type (#96321)
Fixes
https://github.com/vercel/next.js/pull/96198#discussion_r3666434724.
Bumps the pinned `@types/node` version to `20.17.7` to get an upstream
fix for `findSourceMap` type.
Also regenerates the pnpm patch due to a conflict.
I upgraded by just a patch because I'm not sure if we rely on being on
an old version here.
## Test Plan
`findSourceMap` now shows correct types.
<img width="694" height="335" alt="Screenshot 2026-07-29 at 01 02 48"
src="https://github.com/user-attachments/assets/cfe740e0-b8bf-4edc-ac27-698f926feb32"
/>
