fix: frontend/Playbook-Frontend/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-AJV-15274295

Author: snyk-bot

frontend/Playbook-Frontend/package.json

@@ -15,7 +15,7 @@
     "@nuxtjs/auth": "^4.9.1",
     "@nuxtjs/axios": "^5.3.6",
     "apexcharts": "^3.19.0",
-    "nuxt": "^2.0.0",
+    "nuxt": "^3.0.0",
     "uuid": "^8.0.0",
     "vue-apexcharts": "^1.5.3",
     "vue-organization-chart": "^1.1.6",