Bump postcss from 8.4.47 to 8.4.48 (#7166)

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.47 to 8.4.48.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.4.47...8.4.48)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -70,7 +70,7 @@
     "luxon": "^3.5.0",
     "mini-css-extract-plugin": "2.9.2",
     "normalize-path": "^3.0.0",
-    "postcss": "8.4.47",
+    "postcss": "8.4.48",
     "postcss-hexrgba": "2.1.0",
     "postcss-loader": "8.1.1",
     "postcss-url": "10.1.3",