Bump postcss in /dashboard in the npm_and_yarn group across 1 directory

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


Updates `postcss` from 8.5.0 to 8.5.1
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.5.0...8.5.1)

---
updated-dependencies:
- dependency-name: postcss
  dependency-version: 8.5.1
  dependency-type: direct:production
  dependency-group: npm_and_yarn
...

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

Author: dependabot[bot]

dashboard/package-lock.json

@@ -11,7 +11,7 @@
     "@testing-library/react": "^16.0.1",
     "@testing-library/user-event": "^14.5.2",
     "dashboard": "file:",
-    "postcss": "^8.5.0",
+    "postcss": "^8.5.1",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
     "react-icons": "^5.4.0",