docs: remove extra blank line

Author: planetf1

README.md

@@ -27,8 +27,6 @@ uv pip install mellea
 See [installation docs](https://docs.mellea.ai/getting-started/installation) for additional options, such as installing all extras via `uv pip install 'mellea[all]'`.
 For source installation directly from this repo, see [CONTRIBUTING.md](CONTRIBUTING.md).
 
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 ## Example
 
 The `@generative` decorator turns a typed Python function into a structured LLM call.