Use consistent quotation marks in a new translatable message

Double quotation marks are used everywhere else in glib, as per
<https://developer.gnome.org/hig/stable/typography.html>.

gio/gdbusconnection.c

@@ -4606,7 +4606,7 @@ handle_get_all_properties (GDBusConnection *connection,
       GDBusMessage *reply;
       reply = g_dbus_message_new_method_error (message,
                                                "org.freedesktop.DBus.Error.InvalidArgs",
-                                               _("No such interface ‘%s’"),
+                                               _("No such interface “%s”"),
                                                interface_name);
       g_dbus_connection_send_message_unlocked (eo->connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL);
       g_object_unref (reply);