chore(python): Update the python version in docs presubmit to use 3.10#511

parthea merged 2 commits intomaingoogleapis/proto-plus-python:mainfrom

owl-bot-update-lock-a1c5112b81d645f5bbc4d4bbc99d7dcb5089a52216c0e3fb1203a0eeabadd7d5googleapis/proto-plus-python:owl-bot-update-lock-a1c5112b81d645f5bbc4d4bbc99d7dcb5089a52216c0e3fb1203a0eeabadd7d5Copy head branch name to clipboard