Image compression, Github action: Change frequency (HDS-5693) (#3433)

Author: KristinLBradley

.github/workflows/ci-compress-images.yml

@@ -2,7 +2,7 @@ name: Compress Images
 on:
   workflow_dispatch:
   schedule:
-    - cron: "00 23 * * 0"
+    - cron: "0 23 1 * *" # monthly: 23:00 UTC on day 1 of each month
 
 env:
   NODE_VERSION: "24.x"