* added hybrid search example
Added an example about hybrid search for faq pipeline on covid dataset
* formatted with back formatter
* renamed document
* fixed
* fixed typos
* added test
added test for hybrid search
* fixed withespaces
* removed test for hybrid search
* fixed pylint
* commented logging
* fixed bug in join_docs.py _concatenate_results
* Update join_docs.py
updated comment
* format with black
* added releasenote on PR
* updated release notes
* updated test_join_documents
* updated test
* updated test
* Update test_join_documents.py
* formatted with black
* fixed test
* fixed
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Co-authored-by: Stefano Fiorucci <44616784+anakin87@users.noreply.github.com>
