Loosen @sentry/nextjs webpack peer dependency (#13826)

The peer dependency introduced in
#13571 seems to be
too strict.
After installing the latest next version (14.2.13) and @sentry/next
version (8.32.0), I get the following:
```sh
└─┬ @sentry/nextjs 8.32.0
  └── ✕ unmet peer [email protected]: found 5.95.0
```

---------

Co-authored-by: Luca Forstner <[email protected]>

packages/nextjs/package.json

@@ -92,7 +92,7 @@
   },
   "peerDependencies": {
     "next": "^13.2.0 || ^14.0 || ^15.0.0-rc.0",
-    "webpack": "5.94.0"
+    "webpack": ">=5.0.0"
   },
   "peerDependenciesMeta": {
     "webpack": {