Update keep-cache-alive.yml

Author: gboeing

.github/workflows/keep-cache-alive.yml

@@ -8,7 +8,7 @@ permissions:
 # so this runs every Mon and Thu to update the cache's last accessed time
 on:  # yamllint disable-line rule:truthy
   schedule:
-    - cron: 0 5 * * 1,4
+    - cron: 19 5 * * 1,4
 
 jobs:
   keepalive: