fix: package.json & yarn.lock to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-NEXT-10176058

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": "^14.2.24",
     "next-auth": "4.0.0-beta.6",
     "next-connect": "^0.10.2",
     "react": "^17.0.2",