[DSC-2574] fix longtext show more button

Author: Andrea Barbasso

src/app/cris-layout/cris-layout-matrix/cris-layout-box-container/boxes/metadata/rendering-types/longtext/longtext.component.html

@@ -2,7 +2,7 @@
    <div class="{{field.styleValue}}">
     <ds-truncatable [id]="truncableId">
       <ds-truncatable-part [id]="truncableId" [minLines]="3">
-        <div [innerHTML]="formatText(metadataValue.value)" data-test="formatted-text"></div>
+        <span [innerHTML]="formatText(metadataValue.value)" data-test="formatted-text"></span>
       </ds-truncatable-part>
     </ds-truncatable>
   </div>