Documentation: add optional auth to whatsupdocker documentation

Co-Authored-By: zmweske <31971632+zmweske@users.noreply.github.com>

docs/widgets/services/whatsupdocker.md

@@ -1,11 +1,9 @@
 ---
-title: Whats Up Docker
+title: What's Up Docker
-description: WhatsUpDocker Widget Configuration
+description: What's Up Docker Widget Configuration
 ---
 
-Learn more about [Whats Up Docker](https://github.com/fmartinou/whats-up-docker).
+Learn more about [What's Up Docker](https://github.com/fmartinou/whats-up-docker).
-
-Currently requires unauthenticated whatsupdocker instance.
 
 Allowed fields: `["monitoring", "updates"]`.
 
@@ -13,4 +11,6 @@ Allowed fields: `["monitoring", "updates"]`.
 widget:
   type: whatsupdocker
   url: http://whatsupdocker:port
+  username: username # optional
+  password: password # optional
 ```