fix: upgrade next from 12.0.7 to 12.3.4

Snyk has created this PR to upgrade next from 12.0.7 to 12.3.4.

See this package in yarn:
next

See this project in Snyk:
https://app.snyk.io/org/devfile/project/6ac056ca-9142-46e4-b759-75f14947940f?utm_source=github&utm_medium=referral&page=upgrade-pr

package.json

@@ -31,7 +31,7 @@
     "@szhsin/react-menu": "^2.3.2",
     "asciidoctor": "^2.2.5",
     "highlight.js": "^11.4.0",
-    "next": "^12.0.7",
+    "next": "^12.3.4",
     "next-compose-plugins": "^2.2.1",
     "next-images": "^1.8.4",
     "next-transpile-modules": "^9.0.0",