fix: package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-NEXT-6032387

package.json

@@ -79,7 +79,7 @@
     "monaco-vscode-textmate-theme-converter": "0.1.7",
     "monacode": "0.3.1",
     "morgan": "1.10.0",
-    "next": "13.1.6",
+    "next": "13.5.0",
     "next-plugin-preact": "3.0.6",
     "nookies": "2.5.2",
     "onigasm": "2.2.5",