[docs] [issue34580] sqlite doc: clarify the scope of the context manager

[Daniel Jakots]

Daniel Jakots <lolbuntu at chown.me> added the comment:

Thanks for working on this bug!

My message focussed on the closing aspect because that was my problem. :)

Maybe the wording should be more general like:
- "Note that this does not automatically call :meth:`close` on the connection object."
+ "Note that this does not automatically handle the connection object."

(I'm not sure if I should comment here or on the PR on gh)

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34580>
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