SEO: Many top hits for HSDS search terms go to v2.0 docs

[pimlottc]

Many of the top hits for HSDS-related search terms go to older version of the docs, when they should probably go to pages under latest

Some examples:

• Search query: Human Services Data Specification 2nd hit goes to http://docs.openreferral.org/en/v2.0/hsds/

• Search query: open referral hsds Featured snippet (which is shown above all hits) goes to http://docs.openreferral.org/en/v2.0/hsds/

• Search query: hsds health Top hit (below snippet) goes to https://docs.openreferral.org/en/v2.0.1/hsds/about/