ci: switch openqa job to R4.2

Author: marmarek

.gitlab-ci.yml

@@ -5,9 +5,9 @@ include:
   project: QubesOS/qubes-continuous-integration
 - file: /r4.1/gitlab-dom0-install.yml
   project: QubesOS/qubes-continuous-integration
-- file: /r4.1/gitlab-dom0-openqa.yml
-  project: QubesOS/qubes-continuous-integration
 - file: /r4.2/gitlab-base.yml
   project: QubesOS/qubes-continuous-integration
 - file: /r4.2/gitlab-host-build.yml
   project: QubesOS/qubes-continuous-integration
+- file: /r4.2/gitlab-host-openqa.yml
+  project: QubesOS/qubes-continuous-integration