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 8.4.44 to 8.4.45
- [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/8.4.44...8.4.45)

---
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

@@ -79,7 +79,7 @@
         "eslint-plugin-react": "^7.34.3",
         "lint-staged": "^15.2.8",
         "mini-css-extract-plugin": "^2.9.1",
-        "postcss": "^8.4.44",
+        "postcss": "^8.4.45",
         "prettier": "^3.3.3",
         "pretty-quick": "^4.0.0",
         "tailwindcss": "^3.4.10",
@@ -18207,9 +18207,9 @@
       }
     },
     "node_modules/postcss": {
-      "version": "8.4.44",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.44.tgz",
-      "integrity": "sha512-Aweb9unOEpQ3ezu4Q00DPvvM2ZTUitJdNKeP/+uQgr1IBIqu574IaZoURId7BKtWMREwzKa9OgzPzezWGPWFQw==",
+      "version": "8.4.45",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.45.tgz",
+      "integrity": "sha512-7KTLTdzdZZYscUc65XmjFiB73vBhBfbPztCYdUNvlaso9PrzjzcmjqBPR0lNGkcVlcO4BjiO5rK/qNz+XAen1Q==",
       "funding": [
         {
           "type": "opencollective",

apps/OpenSign/package.json

@@ -111,7 +111,7 @@
     "eslint-plugin-react": "^7.34.3",
     "lint-staged": "^15.2.8",
     "mini-css-extract-plugin": "^2.9.1",
-    "postcss": "^8.4.44",
+    "postcss": "^8.4.45",
     "prettier": "^3.3.3",
     "pretty-quick": "^4.0.0",
     "tailwindcss": "^3.4.10",