build(deps): bump postcss from 8.4.47 to 8.4.48

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] <support@github.com>

package.json

@@ -20,7 +20,7 @@
     "lodash.assign": "^4.2.0",
     "node-notifier": "^10.0.1",
     "path": "^0.12.7",
-    "postcss": "^8.4.47",
+    "postcss": "^8.4.48",
     "sass": "^1.80.4",
     "smooth-scroll": "^16.1.3",
     "watchify": "^4.0.0",