light update: use number badge

src/vs/workbench/parts/update/electron-browser/update.ts

@@ -15,7 +15,7 @@ import pkg from 'vs/platform/node/package';
 import product from 'vs/platform/node/product';
 import URI from 'vs/base/common/uri';
 import { IWorkbenchEditorService } from 'vs/workbench/services/editor/common/editorService';
-import { IActivityBarService, TextBadge } from 'vs/workbench/services/activity/common/activityBarService';
+import { IActivityBarService, NumberBadge } from 'vs/workbench/services/activity/common/activityBarService';
 import { IInstantiationService, ServicesAccessor } from 'vs/platform/instantiation/common/instantiation';
 import { ReleaseNotesInput } from 'vs/workbench/parts/update/electron-browser/releaseNotesInput';
 import { IGlobalActivity } from 'vs/workbench/browser/activity';
@@ -297,7 +297,7 @@ export class LightUpdateContribution implements IGlobalActivity {
 		@IActivityBarService activityBarService: IActivityBarService
 	) {
 		this.updateService.onUpdateReady(() => {
-			const badge = new TextBadge('\u21e9', () => nls.localize('updateIsReady', "New update available."));
+			const badge = new NumberBadge(1, () => nls.localize('updateIsReady', "New update available."));
 			activityBarService.showGlobalActivity(this.id, badge);
 		});