Fix code highlighting in hovers

Fixes #79589

Add a few more tags to allowed attributes

src/vs/base/browser/markdownRenderer.ts

@@ -183,9 +183,11 @@ export function renderMarkdown(markdown: IMarkdownString, options: MarkdownRende
 		allowedAttributes: {
 			'a': ['href', 'name', 'target', 'data-href'],
 			'iframe': ['allowfullscreen', 'frameborder', 'src'],
-			'img': ['src', 'title', 'alt', 'width', 'height']
+			'img': ['src', 'title', 'alt', 'width', 'height'],
+			'div': ['class', 'data-code']
 		}
 	});
+
 	signalInnerHTML!();
 
 	return element;