Update modules/ROOT/pages/comments-callback-mode.adoc

Co-authored-by: Mitchell Crompton <[email protected]>

Author: kemister85

modules/ROOT/pages/comments-callback-mode.adoc

@@ -70,7 +70,7 @@ include::partial$configuration/tinycomments_delete_all.adoc[leveloffset=+1]
 
 include::partial$configuration/tinycomments_lookup.adoc[leveloffset=+1]
 
-== Optional callback functions
+=== Optional callback functions
 
 
 include::partial$configuration/tinycomments_resolve.adoc[leveloffset=+1]