increase timeout (#947)

Author: ben-c-at-moz

taskcluster/kinds/new-beta-qa/kind.yml

@@ -8,7 +8,7 @@ task-defaults:
   worker-type: t-linux-wayland
   worker:
     taskcluster-proxy: true
-    max-run-time: 3600
+    max-run-time: 7200
     artifacts:
       - name: public/results
         path: checkouts/vcs/artifacts