Add .. seealso doc sections in ApplicationBuilder.

[aelkheir]

Closes #3825

• Added .. versionadded:: NEXT.VERSION, .. versionchanged:: NEXT.VERSION or .. deprecated:: NEXT.VERSION to the docstrings for user facing changes (for methods/class descriptions, arguments and attributes)
• Created new or adapted existing unit tests
• Documented code changes according to the CSI standard
• Added myself alphabetically to AUTHORS.rst (optional)
• Added new classes & modules to the docs and all suitable __all__ s
• Checked the Stability Policy in case of deprecations or changes to documented behavior

Hi, did not wish for my first contribution to be docs 😔. But I know they're just as important, so ..

Affected methods:

connect_timeout / get_updates_connect_timeout
connection_pool_size / get_updates_connection_pool_size
pool_timeout / get_updates_pool_timeout
read_timeout / get_updates_read_timeout
write_tiemout / get_updates_write_tiemout

Already documented correctely

proxy_url / get_updates_proxy_url
request / get_updates_requset
http_version / get_updates_http_version

Ran sphinx-build and the new See also sections seemed to be working fine.

I also added my self to the authors list. Thanks.

[harshil21]

Thank you for the contribution!