build(deps-dev): bump postcss from 8.4.39 to 8.4.45 in /dashboard

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.39 to 8.4.45.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.4.39...8.4.45)

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

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

dashboard/package.json

@@ -74,7 +74,7 @@
     "husky": "^9.0.11",
     "jest": "^29.5.0",
     "jest-environment-jsdom": "^29.6.4",
-    "postcss": "^8.4.39",
+    "postcss": "^8.4.45",
     "prettier": "^3.2.5",
     "prettier-plugin-tailwindcss": "^0.5.12",
     "storybook": "^8.1.10",