[DOC] Incorrect Hybrid Search Documentation

[navneet1v]

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In the documentation of hybrid search it is mentioned this Before using a hybrid query, you must set up a machine learning (ML) model

ReF: https://opensearch.org/docs/latest/query-dsl/compound/hybrid/#:~:text=Before%20using%20a%20hybrid%20query%2C%20you%20must%20set%20up%20a%20machine%20learning%20(ML)%20model

Same thing is mentioned here: https://opensearch.org/docs/latest/search-plugins/hybrid-search/#using-hybrid-search:~:text=Before%20using%20hybrid%20search%2C%20you%20must%20set%20up%20a%20text%20embedding%20model.%20For%20more%20information%2C%20see%20Choosing%20a%20model.

This is completely incorrect. We should say that before following the below tutorial you should setup the model but setting of model is not a pre-requistic for using hybrid search

This is not correct. Setting of model is not required as hybrid search works with normal vector also. Due to this there has been a lot of confusion from customers that hybrid search requires ML model. This needs to be fixed.

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NA