Fix stream location for StreamHandler

This should read `stream` instead of `location`.

Author: bradjones1

docs/structured_logging.md

@@ -141,7 +141,7 @@ formatters:
 handlers:
     console:
         class: logging.StreamHandler
-        location: ext://sys.stdout
+        stream: ext://sys.stdout
     file:
         class: logging.FileHandler
         formatter: json