feat: upgrade next from 12.0.5 to 15.0.3

Snyk has created this PR to upgrade next from 12.0.5 to 15.0.3.

See this package in yarn:
next

See this project in Snyk:
https://app.snyk.io/org/q1blue-rxw/project/c0217a4f-47b0-457c-9346-d1d11858d763?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

package.json

@@ -23,7 +23,7 @@
     "bcryptjs": "^2.4.3",
     "classnames": "^2.3.1",
     "lodash": "^4.17.21",
-    "next": "^12.0.5",
+    "next": "^15.0.3",
     "next-auth": "4.0.0-beta.6",
     "next-connect": "^0.10.2",
     "react": "^17.0.2",