Update Sentry Example Page (auto-added in CLI) to work with cache components

`dymanic` is not allowed with cache components and currently our added example page throws this error:

```
./app/api/sentry-example-api/route.ts:2:14
Error: Route segment config "dynamic" is not compatible with `nextConfig.cacheComponents`. Please remove it.
1 | import * as Sentry from "@sentry/nextjs";
> 2 | export const dynamic = "force-dynamic";
| ^^^^^^^
3 |
4 | class SentryExampleAPIError extends Error {
5 | constructor(message: string | undefined) {

Ecmascript file had an error

at (./app/api/sentry-example-api/route.ts:2:14)
[ELIFECYCLE] Command failed with exit code 1.
```

Start with the generated app/api/sentry-example-api/route.ts and reproduce the failure with nextConfig.cacheComponents enabled. Then find the CLI template that creates this example page and verify the generated route builds successfully without the reported route-segment configuration error.

索引モデルが issue の本文から書いたものです。