Fix AUTOMATIC example as per Christian Amsüss review of 2025/5/5

Author: douglm

sources/sections/60-caldav.adoc

@@ -44,8 +44,7 @@ Example::
 [source,xml]
 ----
 <C:supported-task-mode-set xmlns:C="urn:ietf:params:xml:ns:caldav">
-  <C:supported-task-mode>AUTOMATIC-COMPLETION</C:supported-task-mode>
-  <C:supported-task-mode>AUTOMATIC-FAILURE</C:supported-task-mode>
+  <C:supported-task-mode>AUTOMATIC</C:supported-task-mode>
   <C:supported-task-mode>SERVER</C:supported-task-mode>
   <C:supported-task-mode>CLIENT</C:supported-task-mode>
 </C:supported-task-mode-set>