Make Harbor garbage collection run at night to prevent race conditions with UBI-rust-builder builds

Author: dervoeti

apps/jjb/maintenance.j2

@@ -89,7 +89,7 @@
           browser-url: https://github.com/stackabletech/ci.git
           timeout: 20
     triggers:
-      - timed: "H 7 * * *"
+      - timed: "H 1 * * *"
     wrappers:
       - credentials-binding:
         - text: