docs: switch all examples at once

[coszio]

When browsing the documentation, we normally have http / python versions of each example. But the http example is always selected by default, and when we switch to python, only the example we switched is changed, which is a bit cumbersome for a user that is only using the python client.

It would make sense for a python user who is browsing the docs, to only have to make the switch once, and have all the examples switch to the python version.