js: Split gi imports to be on new lines to prepare for ES modules

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2794>

subprojects/extensions-tool/src/templates/indicator/extension.js

@@ -20,7 +20,8 @@
 
 const GETTEXT_DOMAIN = 'my-indicator-extension';
 
-const { GObject, St } = imports.gi;
+const GObject = imports.gi.GObject;
+const St = imports.gi.St;
 
 const ExtensionUtils = imports.misc.extensionUtils;
 const Main = imports.ui.main;