build(deps): bump postcss from 8.5.15 to 8.5.16

Bumps [postcss](https://github.com/postcss/postcss) from 8.5.15 to 8.5.16.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.5.15...8.5.16)

---
updated-dependencies:
- dependency-name: postcss
  dependency-version: 8.5.16
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package.json

@@ -58,7 +58,7 @@
     "ohash": "^2.0.11",
     "otpauth": "^9.5.1",
     "papaparse": "^5.5.4",
-    "postcss": "^8.5.15",
+    "postcss": "^8.5.16",
     "posthog-js": "^1.398.0",
     "posthog-node": "^5.39.4",
     "qrcode": "^1.5.4",