group_vars/frigate: Keep back yard recordings

We're trying to discover how the possums are getting into and out of the
house.  Let's enable continuous video recording from the back yard
camera so we can observe them and come up with a plan to get rid of
them.

group_vars/frigate/main.yml

@@ -74,7 +74,7 @@ frigate_cameras:
       - bird
     record:
       enabled: true
-      retain_days: 0
+      retain_days: 2
       events:
         retain:
           default: 90