Normalize mimetype select action name

src/vs/workbench/contrib/notebook/browser/view/renderers/cellOutput.ts

@@ -342,7 +342,7 @@ export class CellOutputElement extends Disposable {
 		};
 
 		// TODO: This could probably be a real registered action, but it has to talk to this output element
-		const pickAction = new Action('notebook.output.pickMimetype', nls.localize('pickMimeType', "Choose a different output mimetype"), ThemeIcon.asClassName(mimetypeIcon), undefined,
+		const pickAction = new Action('notebook.output.pickMimetype', nls.localize('pickMimeType', "Choose Output Mimetype"), ThemeIcon.asClassName(mimetypeIcon), undefined,
 			async _context => this._pickActiveMimeTypeRenderer(notebookTextModel, kernel, this.output));
 		if (index === 0 && useConsolidatedButton) {
 			const menu = this._renderDisposableStore.add(this.menuService.createMenu(MenuId.NotebookOutputToolbar, this.contextKeyService));