Bump postcss from 8.4.48 to 8.4.49 in /ui

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.48 to 8.4.49.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.4.48...8.4.49)

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

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

ui/package.json

@@ -45,7 +45,7 @@
     "imagemin": "^9.0.0",
     "jest": "^27.5.1",
     "mini-css-extract-plugin": "^2.9.2",
-    "postcss": "^8.4.48",
+    "postcss": "^8.4.49",
     "prettier": "^3.3.3",
     "prop-types": "^15.8.1",
     "raw-loader": "^4.0.2",