ODCS: Run ELN composes three times per day

This will allow us a faster feedback loop with Content Resolver
updates.

Signed-off-by: Stephen Gallagher <sgallagh@redhat.com>

roles/odcs/backend/tasks/main.yml

@@ -230,6 +230,6 @@
   cron:
     name: "ELN periodic compose"
     minute: "0"
-    hour: "0"
+    hour: "*/8"
     job: 'odcs --token=/etc/releng-odcs-oidc-token create-raw-config --compose-type=production --label=Alpha-0.`date "+\%s"` eln eln'
   when: inventory_hostname.startswith('odcs-backend-releng')