fix: examples/realtime/nextjs-authorization-demo/package.json to reduce vulnerabilities
The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-NEXT-12299318
- https://snyk.io/vuln/SNYK-JS-NEXT-12301496
- https://snyk.io/vuln/SNYK-JS-NEXT-12265451