feat: upgrade next from 12.3.4 to 13.5.5

Snyk has created this PR to upgrade next from 12.3.4 to 13.5.5.

See this package in npm:
https://www.npmjs.com/package/next

See this project in Snyk:
https://app.snyk.io/org/q1blue-rxw/project/c899d8da-c199-4766-8d40-aa8d9a71141f?utm_source=github&utm_medium=referral&page=upgrade-pr

packages/job-server/package.json

@@ -47,7 +47,7 @@
     "ioredis": "^5.2.4",
     "luxon": "^3.1.0",
     "mysql2": "^2.3.3",
-    "next": "^v12.3.2",
+    "next": "^13.5.5",
     "octokit": "^2.0.10",
     "pino": "^8.7.0",
     "react": "^17.0.2",