reclassify certain "Percent" annotations as "Rate"

[davelandry]

We need to know to multiply these numbers by 100 for the vizbuilder.

This effects:

• most county_health_rankings measures
• ed_defaults "Default Rate"

[hwchen]

fixed in chr by https://github.com/Datawheel/chr-core-etl/commit/9843252d52e5bb12a3a2b90ebf3234446a41f1dd

[jspeis]

ed defaults annotation fixed in fossil-lake