docs(instrumentation-winston): Clarify the duplicate logging workaround

[vordimous]

Which problem is this PR solving?

• I spent a few days trying to figure out how to stop duplicate logs from happening while needing to use the OpenTelemetryTransportV3 to format my payload correctly.

Short description of the changes

• This adds some clarity and an example how to correctly disable the default logger in the auto instrumentation.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.07%. Comparing base (4384c7b) to head (3c147e2).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2831   +/-   ##
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  Coverage   89.07%   89.07%           
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  Files         188      188           
  Lines        9223     9223           
  Branches     1900     1900           
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  Hits         8215     8215           
  Misses       1008     1008           

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[trentm]

Thanks, @vordimous!