Bump postcss from 8.4.45 to 8.4.48 in /web

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.45 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@8.4.45...8.4.48)

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

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

web/package.json

@@ -36,7 +36,7 @@
   "devDependencies": {
     "@babel/plugin-proposal-private-property-in-object": "^7.21.11",
     "autoprefixer": "^10.4.20",
-    "postcss": "^8.4.45",
+    "postcss": "^8.4.48",
     "react-router-dom": "^6.26.1",
     "tailwindcss": "^3.4.10"
   }