Update doc/sphinx-guides/source/api/native-api.rst

Co-authored-by: Philip Durbin <philip_durbin@harvard.edu>

Author: stevenwinship

doc/sphinx-guides/source/api/native-api.rst

@@ -4038,7 +4038,7 @@ The fully expanded example above (without environment variables) looks like this
 
   curl -H "X-Dataverse-key:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" -X PUT -d true "https://demo.dataverse.org/api/files/:persistentId/restrict?persistentId=doi:10.5072/FK2/AAA000"
 
-Optional Json string with additional attributes:
+Optional JSON string with additional attributes:
 
 .. code-block:: bash