DOC-2592: Improve a11ychecker_allow_decorative_images admonition

Author: Farzad Hayatbakhsh

modules/ROOT/partials/configuration/a11ychecker_allow_decorative_images.adoc

@@ -27,7 +27,7 @@ If `+a11ychecker_allow_decorative_images+` is set to `+false+`, the Accessibilit
 
 [NOTE]
 ====
-If xref:a11ychecker.adoc#a11y_advanced_options[`+a11y_advanced_options+`] is set to `+true+`, `+a11ychecker_allow_decorative_images+` will default to `+true+`.
+If `+a11ychecker_allow_decorative_images+` is not explicitly set, the value defined in `xref:a11ychecker.adoc#a11y_advanced_options[a11y_advanced_options]` will be used.
 ====
 
 *Type:* `+Boolean+`