Re: https://github.com/googleapis/python-vision/issues/6, the generated methods on the `ImageAnnotatorClient` class do not play nicely with Pylint.
As a workaround, let's add this to the README so that future users have a chance to see this limitation up-front and save themselves some time.

Co-authored-by: gcf-merge-on-green[bot] <60162190+gcf-merge-on-green[bot]@users.noreply.github.com>
Co-authored-by: Anthonios Partheniou <partheniou@google.com>

* ci: use the latest version of sphinx

* 🦉 Updates from OwlBot

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

🤖 I have created a release \*beep\* \*boop\*
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## [2.6.0](https://www.github.com/googleapis/python-vision/compare/v2.5.0...v2.6.0) (2021-10-20)


### Features

* add support for python 3.10 ([#253](https://www.github.com/googleapis/python-vision/issues/253)) ([7d5e27a](https://www.github.com/googleapis/python-vision/commit/7d5e27af26b13e1854c50f2ff7a7bdd7feea7b0a))


### Documentation

* **readme:** add pylint limitations ([#246](https://www.github.com/googleapis/python-vision/issues/246)) ([e4fb61f](https://www.github.com/googleapis/python-vision/commit/e4fb61f276f4540149884e8098fc4575f30ec9a6))
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