add note about htmlObjectEl

Author: Ryan Patrick Kyle

dash-info.yaml

@@ -1536,6 +1536,9 @@ r_examples:
     - name: htmlObjectEl
       dontrun: TRUE
       code: |
+            # Note that htmlObjectEl generates the <object> HTML element;
+            # for more information, please visit the link in this
+            # component's description.      
             library(dash)
             library(dashHtmlComponents)
             library(dashCoreComponents)