add newline to readme

Author: charleslien

common/src/templates/initial-agents-dir/README.md

@@ -50,3 +50,4 @@ Edit `my-custom-agent.ts` with your team's patterns, then run `codebuff --agent
 For detailed documentation, see [agent-guide.md](./agent-guide.md).
 For examples, check the `examples/` directory.
 For help, join our [Discord community](https://codebuff.com/discord).
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