NPM: Bump postcss from 8.4.39 to 8.4.40 in the npm-dependencies group

Bumps the npm-dependencies group with 1 update: [postcss](https://github.com/postcss/postcss).


Updates `postcss` from 8.4.39 to 8.4.40
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.4.39...8.4.40)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -18,7 +18,7 @@
     "devDependencies": {
         "esbuild": "^0.23.0",
         "esbuild-sass-plugin": "^3.3.1",
-        "postcss": "^8.4.39",
+        "postcss": "^8.4.40",
         "prettier": "^3.3.3",
         "stylelint": "^16.7.0",
         "stylelint-config-standard-scss": "^13.1.0",