Update helper code

client/src/helpers/highlight.ts

@@ -12,7 +12,7 @@ import popover from '@/helpers/popover';
 // Also, we probably want to store the text of the selection at least, and maybe even some more for context?
 
 export interface Highlight {
-  contentBlock: string; // the id
+  page: string; // the id
   contentIndex: number; // which content of the .contents array do I come from?
   contentUuid: string; // the wagtail UUID of the content element
   paragraphIndex: number; // which paragraph inside the textBlock do I come from?
@@ -160,7 +160,7 @@ export const getSelectionHandler =
 
               const { start, end } = range.toCharacterRange(startAncestor);
               const highlightedText: Highlight = {
-                contentBlock: contentBlock.id,
+                page: contentBlock.id,
                 contentIndex: position,
                 contentUuid: uuid,
                 startPosition: start,