clarify unstable_dev()

Author: penalosa

src/content/docs/workers/wrangler/api.mdx

@@ -55,9 +55,7 @@ By default, `unstable_dev` will perform integration tests against a local server
 
 :::note
 
-The `unstable_dev()` function has an `unstable_` prefix because the API is experimental and may change in the future.
-
-`unstable_dev()` has no known bugs and is safe to use. If you discover any bugs, open a [GitHub issue](https://github.com/cloudflare/workers-sdk/issues/new/choose).
+The `unstable_dev()` function has an `unstable_` prefix because the API is experimental and may change in the future. We recommend migrating to the `unstable_startWorker()` API, documented above.
 
 If you have been using `unstable_dev()` for integration testing and want to migrate to Cloudflare's Vitest integration, refer to the [Migrate from `unstable_dev` migration guide](/workers/testing/vitest-integration/get-started/migrate-from-unstable-dev/) for more information.