fix: upgrade next from 13.5.4 to 13.5.6

Snyk has created this PR to upgrade next from 13.5.4 to 13.5.6.

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

See this project in Snyk:
https://app.snyk.io/org/engineering-CGCiXj96RbVotntN7wcPgV/project/c09833c9-b3e8-43ce-8475-92fafba4f0e2?utm_source=github&utm_medium=referral&page=upgrade-pr

e2e/browser/test-app/package.json

@@ -11,7 +11,7 @@
   "dependencies": {
     "@inrupt/solid-client": "file:../../../",
     "@inrupt/solid-client-authn-browser": "^2.0.0",
-    "next": "^13.5.4",
+    "next": "^13.5.6",
     "react": "^18.2.0",
     "react-dom": "^18.2.0"
   },