Clarify misleading venv docs

[snan]

On my zsh I was still getting /usr/bin/toot even in the venv.

[danschwarz]

This is not my experience. after executing . venv/bin/activate,

❯ which toot
/home/dschwarz/dev/toot/venv/bin/toot

as expected.

Not sure what's going on in your environment?

[snan]

Maybe you're on bash?
I use a shell where path changes aren't applied until next start. Or something, IDK.

[ihabunek]

Thanks.