chore(deps-dev): bump postcss from 8.4.39 to 8.4.40 in /frontend (#3114)

Bumps [postcss](https://github.com/postcss/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](https://github.com/postcss/postcss/compare/8.4.39...8.4.40)

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

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

frontend/package-lock.json

@@ -61,7 +61,7 @@
         "husky": "^9.1.1",
         "jsdom": "^24.1.1",
         "lint-staged": "^15.2.7",
-        "postcss": "^8.4.39",
+        "postcss": "^8.4.40",
         "prettier": "^3.3.3",
         "tailwindcss": "^3.4.6",
         "typescript": "^5.5.4",
@@ -10359,9 +10359,9 @@
       }
     },
     "node_modules/postcss": {
-      "version": "8.4.39",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.39.tgz",
-      "integrity": "sha512-0vzE+lAiG7hZl1/9I8yzKLx3aR9Xbof3fBHKunvMfOCYAtMhrsnccJY2iTURb9EZd5+pLuiNV9/c/GZJOHsgIw==",
+      "version": "8.4.40",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.40.tgz",
+      "integrity": "sha512-YF2kKIUzAofPMpfH6hOi2cGnv/HrUlfucspc7pDyvv7kGdqXrfj8SCl/t8owkEgKEuu8ZcRjSOxFxVLqwChZ2Q==",
       "funding": [
         {
           "type": "opencollective",

frontend/package.json

@@ -84,7 +84,7 @@
     "husky": "^9.1.1",
     "jsdom": "^24.1.1",
     "lint-staged": "^15.2.7",
-    "postcss": "^8.4.39",
+    "postcss": "^8.4.40",
     "prettier": "^3.3.3",
     "tailwindcss": "^3.4.6",
     "typescript": "^5.5.4",