chore(deps): update dependency postcss to v8.4.39

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
postcss (source)	8.4.38 -> 8.4.39

---

Release Notes

postcss/postcss (postcss)

### [`v8.4.39`](https://togithub.com/postcss/postcss/blob/HEAD/CHANGELOG.md#8439) [Compare Source](https://togithub.com/postcss/postcss/compare/8.4.38...8.4.39) - Fixed `CssSyntaxError` types (by [@​romainmenke](https://togithub.com/romainmenke)).

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• [ ] If you want to rebase/retry this PR, check this box

---

This PR has been generated by Mend Renovate. View repository job log here.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 21.93%. Comparing base (d9449ac) to head (4159f2f).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #999 +/- ## ======================================= Coverage 21.93% 21.93% ======================================= Files 375 375 Lines 80103 80103 Branches 1296 1296 ======================================= Hits 17567 17567 Misses 62536 62536 ``` | [Flag](https://app.codecov.io/gh/CrisisCleanup/crisiscleanup-4-web/pull/999/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=CrisisCleanup) | Coverage Δ | | |---|---|---| | [unitTests](https://app.codecov.io/gh/CrisisCleanup/crisiscleanup-4-web/pull/999/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=CrisisCleanup) | `21.93% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=CrisisCleanup#carryforward-flags-in-the-pull-request-comment) to find out more.

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[github-actions[bot]]

Playwright test results

 50 passed
 2 flaky

Details

 52 tests across 12 suites
 4 minutes, 45 seconds
 4159f2f

Flaky tests

firefox-setup › auth.setup.ts › authenticate as admin - `( @primary @slow @read @development @staging @production )` firefox › pages/myOrganization.test.ts › MyOrganization › should have visible data-testids - `( @primary @slow @read @development @staging @production )`