Updated the value data structure the story

src/Umbraco.Web.UI.Client/src/packages/core/property-editor/uis/tiny-mce/property-editor-ui-tiny-mce.stories.ts

@@ -80,7 +80,9 @@ const meta: Meta<UmbPropertyEditorUITinyMceElement> = {
 	id: 'umb-property-editor-ui-tiny-mce',
 	args: {
 		config: undefined,
-		value: `
+		value: {
+			blocks: {},
+			markup: `
 			<h2>TinyMCE</h2>
 			<p>I am a default value for the TinyMCE text editor story.</p>
 			<p>
@@ -92,6 +94,7 @@ const meta: Meta<UmbPropertyEditorUITinyMceElement> = {
 				<a href="https://docs.umbraco.com" target="_blank" rel="noopener noreferrer">Umbraco documentation</a>
 			</p>
 		`,
+		},
 	},
 };