add error level vale DITA rule to modules vale.ini

Author: jldohmann

modules/.vale.ini

@@ -8,7 +8,7 @@ Vocab = OpenShiftDocs
 BasedOnStyles = OpenShiftAsciiDoc, AsciiDoc, RedHat
 
 # Enabling certain DITA rules (YES)
-AsciiDocDITA.AdmonitionTitle = YES
+AsciiDocDITA.TaskExample = YES
 
 # Use local OpenShiftDocs Vocab terms
 Vale.Terms = YES