Typo in DocumentSearchPipeline usage example.

[SiamakShams]

There is a small typo in DocumentSearchPipeline usage example in page: https://docs.haystack.deepset.ai/docs/ready_made_pipelines
Currently the example stands as:

pipeline = Pipeline()
pipeline.add_node(component=retriever, name="Retriever", inputs=["Query"])
result = pipeline.run(query, params={"Retriever": {"top_k": 2})

The last line should be:

result = pipeline.run(query, params={"Retriever": {"top_k": 2}})

Great work, can't get enough of Haystack.

[agnieszka-m]

Thank you! Fixed :)