Merge pull request #969 from cmu-delphi/leonlu2/JHU-Docs

1. updated the available for line

Author: krivard

docs/api/covidcast-signals/jhu-csse.md

@@ -11,7 +11,7 @@ grand_parent: COVIDcast Epidata API
 * **Earliest issue available:** May 7, 2020
 * **Number of data revisions since May 19, 2020:** 1
 * **Date of last change:** [October 7, 2020](../covidcast_changelog.md#jhu-csse)
-* **Available for:** county, hrr, msa, state (see [geography coding docs](../covidcast_geography.md))
+* **Available for:** county, hrr, msa, state, hhs, nation (see [geography coding docs](../covidcast_geography.md))
 * **Time type:** day (see [date format docs](../covidcast_times.md))
 * **License:** [CC BY](#source-and-licensing)