Fix Cron Expr in Update ACE/TAO Workflow

I noticed that the new workflow from OpenDDS#4327 wasn't running. After a bit
of investigation, I saw that I messed up the cron syntax as it shouldn't
have that 0 at the start. Between testing it in my fork and making the
PR and I adjusted the time to be during the off hours of both Europe and
America and must have messed it up then.

.github/workflows/update-ace-tao.yml

@@ -3,7 +3,7 @@ name: "Update ACE/TAO Versions"
 on:
   workflow_dispatch:
   schedule:
-    - cron: '0 33 23 * * *'
+    - cron: '33 23 * * *'
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}