build(deps-dev): bump postcss from 8.2.2 to 8.2.10 in /web

Bumps [postcss](https://github.com/postcss/postcss) from 8.2.2 to 8.2.10.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/postcss/postcss/compare/8.2.2...8.2.10)

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

web/package.json

@@ -35,7 +35,7 @@
     "eslint-plugin-jest": "^24.1.3",
     "eslint-plugin-testing-library": "^3.10.1",
     "jest": "^26.6.3",
-    "postcss": "^8.2.2",
+    "postcss": "^8.2.10",
     "postcss-cli": "^8.3.1",
     "prettier": "^2.2.1",
     "rimraf": "^3.0.2",