chore(deps-dev): Bump next from 9.3.4 to 12.1.0

Bumps [next](https://github.com/vercel/next.js) from 9.3.4 to 12.1.0.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v9.3.4...v12.1.0)

---
updated-dependencies:
- dependency-name: next
  dependency-type: direct:development
...

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

packages/plugin-runner-next/package.json

@@ -13,6 +13,6 @@
     "@garment/runner": "^0.13.2"
   },
   "devDependencies": {
-    "next": "^9.3.4"
+    "next": "^12.1.0"
   }
 }