build(deps): bump @netlify/plugin-nextjs from 5.5.1 to 5.6.0

Bumps [@netlify/plugin-nextjs](https://github.com/netlify/next-runtime) from 5.5.1 to 5.6.0.
- [Release notes](https://github.com/netlify/next-runtime/releases)
- [Changelog](https://github.com/netlify/next-runtime/blob/main/CHANGELOG.md)
- [Commits](netlify/next-runtime@v5.5.1...v5.6.0)

---
updated-dependencies:
- dependency-name: "@netlify/plugin-nextjs"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -11,7 +11,7 @@
   },
   "dependencies": {
     "@mui/icons-material": "^5.15.18",
-    "@netlify/plugin-nextjs": "^5.2.2",
+    "@netlify/plugin-nextjs": "^5.6.0",
     "axios": "^1.6.4",
     "concurrently": "^8.2.1",
     "eslint": "^8.56.0",