Documentation for gsuite_user shouldn't refer to gsuite_user_schema

[soulshake]

The doc page for gsuite_user (title and description) currently references gsuite_user_schema:

I believe this should instead reference gsuite_user.

(I would've expected sidebar_current: "docs-gsuite-resource-user-schema" to cause the wrong section to be highlighted; it doesn't, but this PR updates it anyway too.)