[issue40729] Update the list of auto-generated files in .gitattributes

[Batuhan Taskaya]

Change by Batuhan Taskaya <isidentical at gmail.com>:


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keywords: +patch
pull_requests: +19583
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/20314

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40729>
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