[PR] [MINOR][DOCS] Fixed the scope of the query option in sql-data-sources-jdbc.md [spark]

[via GitHub]

llphxd opened a new pull request, #50048:
URL: https://github.com/apache/spark/pull/50048

   ### What changes were proposed in this pull request?
   The documentation shows that the scope of jdbc's option is read/write, but 
after looking at the source code and testing it, it should actually only be 
read.
   This error has persisted for multiple versions and is still not fixed.
   
   source code:
   
https://github.com/apache/spark/blob/a661f9f305d96331338938e14b6ea0075f234aee/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JDBCOptions.scala#L287
   code snippet:
   
![SnBKfLO4Fu](https://github.com/user-attachments/assets/93162fc6-fd3f-4c7a-8e36-413c50e3d8ff)
   test snippet:
   
![WWWQRqH6jS](https://github.com/user-attachments/assets/07e3191e-406e-46aa-85a9-9c7902892db3)
   
   
   
   ### Why are the changes needed?
   This avoids user confusion about the use of this option and avoids errors in 
its use
   
   
   ### Does this PR introduce _any_ user-facing change?
   No
   
   
   ### How was this patch tested?
   No testing required, just modifying the document
   
   
   ### Was this patch authored or co-authored using generative AI tooling?
   No
   


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