Fix nightly build of C++ docs

[huydhn]

The fix is to upgrade breathe version (and sphinx accordingly), for example https://github.com/pytorch/pytorch/actions/runs/4898593997/jobs/8749163278.

Exception occurred:
  File "/opt/conda/envs/py_3.8/lib/python3.8/site-packages/breathe/renderer/sphinxrenderer.py", line 104, in DomainDirectiveFactory
    'function': (python.PyModulelevel, 'function'),
AttributeError: module 'sphinx.domains.python' has no attribute 'PyModulelevel'

This was missed in #100601 because RUN_DOXYGEN is only set to true in the nightly job. Specifically, the 2 plugins breathe and exhale are only used when RUN_DOXYGEN is set to true https://github.com/pytorch/pytorch/blob/main/docs/cpp/source/conf.py#L37-L42

Testing

https://github.com/pytorch/pytorch/actions/runs/4910813882/jobs/8771541636 passes with RUN_DOXYGEN set to true and C++ docs looks ok https://docs-preview.pytorch.org/100845/cppdocs/index.html

[pytorch-bot]

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🧪 See artifacts and rendered test results at hud.pytorch.org/pr/100845

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[huydhn]

This is for testing in PR. I will remove this line before merging.

[huydhn]

@pytorchbot merge -f 'Doc and lint jobs have passed. There is no need to run trunk jobs for this change'

[pytorchmergebot]

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