Fix #26011

- use em dash instead of en dash

src/vs/workbench/browser/parts/titlebar/titlebarPart.ts

@@ -39,7 +39,7 @@ export class TitlebarPart extends Part implements ITitleService {
 	private static NLS_UNSUPPORTED = nls.localize('patchedWindowTitle', "[Unsupported]");
 	private static NLS_EXTENSION_HOST = nls.localize('devExtensionWindowTitlePrefix', "[Extension Development Host]");
 	private static TITLE_DIRTY = '\u25cf ';
-	private static TITLE_SEPARATOR = ' - ';
+	private static TITLE_SEPARATOR = ' — ';
 
 	private titleContainer: Builder;
 	private title: Builder;