gs_page_authenticate: increase ref for page

3 jobs for fix-crash-on-auth-continue in 4 minutes and 43 seconds (queued for 21 seconds)
latest
Status Job ID Name Coverage
  Build
passed #11751
build-gnome-software

00:04:43

failed #11749
build-gnome-software

00:00:32

failed #11747
build-gnome-software

00:03:21