fix(editor): Pass onCreate callback to editor API

Makes sure that reader content is updated with editor content on initial
load.

Depends on nextcloud/text#6274.

Signed-off-by: Jonas <jonas@freesources.org>

src/mixins/editorMixin.js

@@ -151,6 +151,9 @@ export default {
 					readOnly: false,
 					shareToken: this.shareTokenParam || null,
 					autofocus: false,
+					onCreate: ({ markdown }) => {
+						this.updateEditorContentDebounced(markdown)
+					},
 					onLoaded: () => {
 						this.done('editor')
 					},