Bump next from 8.1.0 to 9.3.2 in /www

Bumps [next](https://github.com/zeit/next.js) from 8.1.0 to 9.3.2.
- [Release notes](https://github.com/zeit/next.js/releases)
- [Commits](vercel/next.js@v8.1.0...v9.3.2)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

www/package.json

@@ -3,7 +3,7 @@
   "license": "MIT",
   "private": true,
   "dependencies": {
-    "next": "^8.0.0-canary.2",
+    "next": "^9.3.2",
     "react": "^16.7.0",
     "react-dom": "^16.7.0"
   },