Typo in Docs: atrrs not an argument of visualize_tokens function(attrs rather)

[Jcharis]

Awesome tool @ines . Just a slight typo in the docs for the visualize_tokens() function.
In the example attrs is spelt as atrrs. We need to make some slight changes.

Great Work!!. Thanks

[svlandeg]

Thanks for the report @Jcharis!

Do you feel like contributing a PR with the fix? The file to be edited is here: https://github.com/explosion/spacy-streamlit/edit/master/README.md