[docs] Remove 'you can' instance from non-optional steps
Summary:
This diff updates our doc so that we are explicit about certain steps being required rather than optional, as was previously implied by using "you can."
Test Plan:
Verify Markdown looks as expected.
Reviewers: atul, O6 Docs, varun
Reviewed By: atul, O6 Docs, varun
Subscribers: varun, jon, ashoat, tomek, atul
Differential Revision: https://phab.comm.dev/D5743