Update modules/ROOT/pages/7.8.0-release-notes.adoc

Author: kemister85

modules/ROOT/pages/7.8.0-release-notes.adoc

@@ -80,7 +80,9 @@ The {productname} {release-version} release includes an accompanying release of
 
 To improve flexibility when working with MathML content, especially in cases where new attributes or elements are not yet supported by DOMPurify, two new configuration options have been introduced: xref:math.adoc#extended-mathml-elements[extended_mathml_elements] and xref:math.adoc#extended-mathml-attributes[extended_mathml_attributes].
 
-Prior to {release-version}, MathML elements and attributes could be configured informally, but were not officially supported. With enhanced security measures introduced in {productname} {release-version}, MathML content is now filtered separately from HTML using DOMPurify, and any unsupported elements or attributes are stripped from the editor content. This change increased security but removed the ability to allow certain MathML-specific content.
+Prior to {release-version}, MathML elements and attributes were treated the same as all other content, with no special handling for MathML-specific structures. As a result, unsupported elements and attributes were either retained without validation or stripped without regard to their MathML context.
+
+In {productname} {release-version}, MathML content is now filtered separately from general HTML using DOMPurify. As part of this change, support has been added to selectively allow specific elements and attributes *within* a `<math>` element using the new configuration options.
 
 The new options allow users to define lists of MathML elements and attributes that should be preserved, even if DOMPurify does not currently recognize them. This enables quicker user-side updates in response to evolving MathML specifications without disabling sanitization or waiting for upstream changes.