Bump postcss from 8.4.17 to 8.4.18

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.17 to 8.4.18.
- [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/8.4.17...8.4.18)

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

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

package.json

@@ -24,7 +24,7 @@
     "@types/react-dom": "18.0.6",
     "autoprefixer": "^10.4.12",
     "copy-to-clipboard": "^3.3.2",
-    "postcss": "^8.4.17",
+    "postcss": "^8.4.18",
     "react-hot-toast": "^2.4.0",
     "react-icons": "^4.4.0",
     "sass": "^1.55.0",