Bump next from 9.5.3 to 9.5.4 in /admin (#36)

Bumps [next](https://github.com/vercel/next.js) from 9.5.3 to 9.5.4.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](https://github.com/vercel/next.js/compare/v9.5.3...v9.5.4)

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

admin/package.json

@@ -17,7 +17,7 @@
     "graphql": "^15.3.0",
     "monaco-editor": "^0.20.0",
     "monaco-editor-webpack-plugin": "^1.9.0",
-    "next": "^9.5.3",
+    "next": "^9.5.4",
     "next-fonts": "^1.0.3",
     "react": "^16.13.1",
     "react-dom": "^16.13.1",