Update callouts.qmd

Removed the duplicate caution, clarified default behaviour.

(cherry picked from commit 3ec5ff7)

Author: serialc

docs/authoring/callouts.qmd

@@ -26,25 +26,19 @@ Callouts provide a simple way to attract attention, for example, to this warning
 :::
 
 ::: callout-important
-## This is Important
-
 Danger, callouts will really improve your writing.
 :::
 
-::: callout-caution
-## Headings are not necessary
-
-Providing a heading is optional and the keyword (Note, Warning, Important, Tip, or Caution) will be used instead.
-:::
-
 ::: callout-tip
 ## Tip With Title
 
-This is an example of a callout with a title.
+This is an example of a callout with a title. Providing a heading is optional.
+
+When no heading is provided the callout type will determine the expected heading (i.e., Note, Warning, Important, Tip, or Caution).
 :::
 
 ::: {.callout-caution collapse="true"}
-## Expand To Learn About Collapse
+## Caution: Expand To Learn About Collapse
 
 This is an example of a 'collapsed' caution callout that can be expanded by the user. You can use `collapse="true"` to collapse it by default or `collapse="false"` to make a collapsible callout that is expanded by default.
 :::