build(deps-dev): bump postcss

Bumps the npm_and_yarn group in /apps/OpenSign with 1 update: [postcss](https://github.com/postcss/postcss).


Updates `postcss` from 8.5.1 to 8.5.2
- [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/8.5.1...8.5.2)

---
updated-dependencies:
- dependency-name: postcss
  dependency-type: direct:development
  dependency-group: npm_and_yarn
...

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

apps/OpenSign/package-lock.json

@@ -83,7 +83,7 @@
         "eslint-plugin-react": "^7.37.4",
         "lint-staged": "^15.4.3",
         "mini-css-extract-plugin": "^2.9.2",
-        "postcss": "^8.5.1",
+        "postcss": "^8.5.2",
         "prettier": "^3.5.0",
         "pretty-quick": "^4.0.0",
         "tailwindcss": "^3.4.17",
@@ -19563,9 +19563,9 @@
       }
     },
     "node_modules/postcss": {
-      "version": "8.5.1",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.1.tgz",
-      "integrity": "sha512-6oz2beyjc5VMn/KV1pPw8fliQkhBXrVn1Z3TVyqZxU8kZpzEKhBdmCFqI6ZbmGtamQvQGuU1sgPTk8ZrXDD7jQ==",
+      "version": "8.5.2",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.2.tgz",
+      "integrity": "sha512-MjOadfU3Ys9KYoX0AdkBlFEF1Vx37uCCeN4ZHnmwm9FfpbsGWMZeBLMmmpY+6Ocqod7mkdZ0DT31OlbsFrLlkA==",
       "funding": [
         {
           "type": "opencollective",

apps/OpenSign/package.json

@@ -113,7 +113,7 @@
     "eslint-plugin-react": "^7.37.4",
     "lint-staged": "^15.4.3",
     "mini-css-extract-plugin": "^2.9.2",
-    "postcss": "^8.5.1",
+    "postcss": "^8.5.2",
     "prettier": "^3.5.0",
     "pretty-quick": "^4.0.0",
     "tailwindcss": "^3.4.17",