docs: Fix reference to SQL QA migration (#25157)

**Description:** I found that the link to the notebook in the Migration
notes is broken, i found that it was linked to this file
https://github.com/langchain-ai/langchain/blob/v0.0.250/docs/extras/use_cases/tabular/sql_query.ipynb
and i think now this tutorial
https://github.com/JuanFKurucz/langchain/blob/master/docs/docs/tutorials/sql_qa.ipynb
is the best fit for this reference

**Twitter handle:** @juanfkurucz

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Co-authored-by: Chester Curme <chester.curme@gmail.com>
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Francisco Kurucz 2024-08-08 10:26:13 -03:00 committed by GitHub
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@ -52,7 +52,7 @@ Now:
`from langchain_experimental.sql import SQLDatabaseChain`
Alternatively, if you are just interested in using the query generation part of the SQL chain, you can check out [`create_sql_query_chain`](https://github.com/langchain-ai/langchain/blob/master/docs/extras/use_cases/tabular/sql_query.ipynb)
Alternatively, if you are just interested in using the query generation part of the SQL chain, you can check out this [`SQL question-answering tutorial`](https://python.langchain.com/v0.2/docs/tutorials/sql_qa/#convert-question-to-sql-query)
`from langchain.chains import create_sql_query_chain`