[3.11] gh-101100: Fix sphinx warnings in `library/asyncio-dev.rst` (GH-111179) (#111186)

gh-101100: Fix sphinx warnings in `library/asyncio-dev.rst` (GH-111179)

* gh-101100: Fix sphinx warnings in `library/asyncio-dev.rst`

* Update Doc/library/asyncio-eventloop.rst

* Update Doc/library/asyncio-eventloop.rst

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(cherry picked from commit 8c689c9b88426384a9736c708701923a1ab1da79)

Co-authored-by: Nikita Sobolev <mail@sobolevn.me>
Co-authored-by: Carol Willing <carolcode@willingconsulting.com>