feat: upgrade next from 12.1.6 to 15.1.3

Snyk has created this PR to upgrade next from 12.1.6 to 15.1.3.

See this package in npm:
next

See this project in Snyk:
https://app.snyk.io/org/q1blue-rxw/project/09d5ac16-0c31-4125-9796-e457446a1750?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot