Adds link for Pulp 3 docs
Adds link for Pulp 3 docs

[noissue]

dkliban/pulpproject.org,bmbouter/pulpproject.org,dkliban/pulpproject.org,dkliban/pulpproject.org,pulp/pulpproject.org,pulp/pulpproject.org,pulp/pulpproject.org,bmbouter/pulpproject.org,pulp/pulpproject.org,bmbouter/pulpproject.org,dkliban/pulpproject.org,bmbouter/pulpproject.org