Bump postcss from 8.4.47 to 8.4.49 in /web

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.47 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@8.4.47...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>

web/package.json

@@ -42,7 +42,7 @@
     "jest": "^29.5.0",
     "jest-environment-jsdom": "^29.5.0",
     "msw": "^1.3.1",
-    "postcss": "^8.4.47",
+    "postcss": "^8.4.49",
     "prettier": "^3.3.3",
     "prettier-plugin-tailwindcss": "^0.6.8",
     "tailwindcss": "^3.4.14"