Abdullah. ed95b8cfde fix: bump postcss to 8.5.22 across app lockfiles (Dependabot) (#23340)
## Summary

Bumps **postcss -> 8.5.22** in the 13 twenty-apps lockfiles that carry
it transitively, clearing **GHSA-r28c-9q8g-f849** (high) on those
manifests: path traversal in previous source map auto-loading
(`sourceMappingURL`) leading to arbitrary `.map` file disclosure,
vulnerable `<= 8.5.17`.

Apps covered: document-generator, hello-world, postcard, self-hosting,
twenty-partners, call-recorder, people-data-labs, twenty-discord,
twenty-exa, twenty-fireflies, twenty-last-contact, twenty-linear,
twenty-slack.

Every app reaches postcss through a caret range (`^8.5.15`), so a
recursive `yarn up -R postcss` lifts it in each project with **no
resolution and no `package.json` change** - the diff is 13 `yarn.lock`
files and nothing else. Yarn resolves to **8.5.22**, the latest in range
(above the 8.5.18 fix floor).

## Not included

The **root lockfile** carries the same advisory but its postcss copies
are held by exact pins - `next` (8.4.31 in every stable release,
including 16.2.11) and `@mintlify/common` (8.5.14, unchanged in its
latest) - so no `yarn up` reaches it. That one needs a scoped resolution
and is handled separately.

## Verification

- postcss resolves to **8.5.22** in all 13 lockfiles; nothing at or
below 8.5.17 remains.
- `yarn install --immutable` passes in each of the 13 projects.
- 8.5.22 published 2026-07-22, clears the 3-day npm age gate.
2026-07-27 08:50:00 +00:00
2026-06-11 11:02:28 +02:00

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