Update stream iteration examples to use the more idiomatic `for await`
syntax since Bun implements ReadableStream.prototype[Symbol.asyncIterator].
Changes:
- binary-data.md: Simplified file hashing example using for await loops
- fetch.md: Updated response body streaming example to use for await
This makes the examples cleaner and follows modern async iteration patterns
supported natively by Bun's ReadableStream implementation.
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>