fix: examples/blog-with-comment/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-LOADERUTILS-3042992
- https://snyk.io/vuln/SNYK-JS-LOADERUTILS-3043105
- https://snyk.io/vuln/SNYK-JS-LOADERUTILS-3105943
- https://snyk.io/vuln/SNYK-JS-NEXT-1540422
- https://snyk.io/vuln/SNYK-JS-NEXT-1577139
- https://snyk.io/vuln/SNYK-JS-NEXT-2405694
- https://snyk.io/vuln/SNYK-JS-NODEFETCH-2342118
- https://snyk.io/vuln/SNYK-JS-POSTCSS-5926692
- https://snyk.io/vuln/SNYK-JS-SHELLQUOTE-1766506

examples/blog-with-comment/package.json

@@ -12,7 +12,7 @@
     "gray-matter": "4.0.3",
     "ioredis": "^4.27.1",
     "nanoid": "^3.1.22",
-    "next": "^10.2.3",
+    "next": "^13.5.4",
     "react": "^17.0.2",
     "react-dom": "^17.0.2",
     "remark": "13.0.0",