test: Clear service errors right before taking the screenshot

On ubuntu-stable, the fwupd-refresh service would otherwise sometimes
manage to fail between resetting the failures at the start of the test
and the time we take the screenshot.

test/verify/check-pages

@@ -446,9 +446,6 @@ OnCalendar=daily
         # On Ubuntu and Debian we would need to generate locales - just ignore it
         self.allow_journal_messages("invalid or unusable locale: de_DE.UTF-8")
 
-        # Clean up failed services for screenshots
-        m.execute("systemctl reset-failed")
-
         self.login_and_go()
 
         filter_sel = ".pf-v5-c-text-input-group__text-input"
@@ -480,7 +477,10 @@ OnCalendar=daily
         b.wait_text("#host-apps li a:contains('Services')", "ServicesContains: systemd")
         b.wait_text("#host-apps li a:contains('Services') mark", "systemd")
 
+        # Clean up failed services for screenshots
+        m.execute("systemctl reset-failed")
         b.wait_not_present("#services-error")
+
         b.assert_pixels("#nav-system", "menu-search", skip_layouts=["mobile"])
         b.set_layout("mobile")
         b.click("#nav-system-item")