[visual-studio-code-bin] Update WM class for URL handler

code-url-handler.desktop

@@ -7,6 +7,7 @@ Icon=visual-studio-code
 Type=Application
 NoDisplay=true
 StartupNotify=true
+StartupWMClass=code-url-handler
 Categories=TextEditor;Development;IDE;
 MimeType=x-scheme-handler/vscode;
 Keywords=vscode;