Bump autoprefixer from 10.4.20 to 10.5.6 in /web (#24340)

Bumps [autoprefixer](https://github.com/postcss/autoprefixer) from 10.4.20 to 10.5.6.
- [Release notes](https://github.com/postcss/autoprefixer/releases)
- [Changelog](https://github.com/postcss/autoprefixer/blob/main/CHANGELOG.md)
- [Commits](https://github.com/postcss/autoprefixer/compare/10.4.20...10.5.6)

---
updated-dependencies:
- dependency-name: autoprefixer
  dependency-version: 10.5.6
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

web/package.json

@@ -114,7 +114,7 @@
     "@types/strftime": "^0.9.8",
     "@vitejs/plugin-react": "^6.1.1",
     "@vitest/coverage-v8": "^4.1.11",
-    "autoprefixer": "^10.4.20",
+    "autoprefixer": "^10.5.6",
     "esbuild": "^0.28.2",
     "eslint": "^10.10.0",
     "eslint-config-prettier": "^10.1.8",