Update subset/superset docs (#8795)
Update subset/superset docs (#8795)

* Update subset/superset docs

* Update website/docs/usage/rule-based-matching.md

Co-authored-by: Adriane Boyd <db6798f4d1599265a9e42d76cc3aa445e7babcd7@gmail.com>

Co-authored-by: Adriane Boyd <db6798f4d1599265a9e42d76cc3aa445e7babcd7@gmail.com>
explosion/spaCy,explosion/spaCy,honnibal/spaCy,honnibal/spaCy,honnibal/spaCy,explosion/spaCy,explosion/spaCy,honnibal/spaCy,explosion/spaCy,explosion/spaCy