test: fix host switching selector

Author: Venefilyn

test/verify/check-shell-host-switching

@@ -559,7 +559,7 @@ class TestHostSwitching(testlib.MachineCase, HostSwitcherHelpers):
         b.click("#nav-hosts .nav-item a[href='/@10.111.113.3']")
         b.wait_visible("iframe.container-frame[name='cockpit1:franz@10.111.113.3/system']")
 
-        b.wait_text("#hosts-sel button .pf-v5-c-select__toggle-text", "franz@machine3")
+        b.wait_text("#hosts-sel button .pf-v6-c-select__toggle-text", "franz@machine3")
         self.open_host_switcher()
         b.wait_text(".nav-item a[href='/@10.111.113.3']", "franz @machine3")
         self.edit_hosts()
@@ -579,7 +579,7 @@ class TestHostSwitching(testlib.MachineCase, HostSwitcherHelpers):
         with b.wait_timeout(30):
             b.wait_not_present('#hosts_setup_server_dialog')
 
-        b.wait_text("#hosts-sel button .pf-v5-c-select__toggle-text", "admin@machine2")
+        b.wait_text("#hosts-sel button .pf-v6-c-select__toggle-text", "admin@machine2")
 
         # Changing the address of a host will navigate to that host,
         # and that will close the host switcher.  Let's open it again