fix: upgrade @nrwl/next from 15.7.2 to 15.9.7

Snyk has created this PR to upgrade @nrwl/next from 15.7.2 to 15.9.7.

See this package in yarn:
@nrwl/next

See this project in Snyk:
https://app.snyk.io/org/devfile/project/b531d744-fc32-4317-a5d5-80e414d9d114?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

package.json

@@ -27,7 +27,7 @@
     "@markdoc/markdoc": "^0.2.1",
     "@markdoc/next.js": "^0.2.1",
     "@next/bundle-analyzer": "^13.2.0",
-    "@nrwl/next": "^15.2.1",
+    "@nrwl/next": "^15.9.7",
     "@schultzp2020/prism-react-renderer": "^1.3.7",
     "@segment/analytics-next": "^1.38.0",
     "@sindresorhus/slugify": "^2.1.0",