[chore] Move weekly update to Fridays (#38635)

<!--Ex. Fixing a bug - Describe the bug and how this fixes the issue.
Ex. Adding a feature - Explain what this achieves.-->
#### Description

Moves weekly update to Fridays to give a bit more time between the
update and the releases

Co-authored-by: Alex Boten <[email protected]>

Author: mx-psi

.github/workflows/update-otel.yaml

@@ -2,7 +2,7 @@ name: 'Update contrib to the latest core source'
 on:
   workflow_dispatch:
   schedule:
-    - cron: "27 8 * * 1" # Run at 08:27 UTC on Mondays.
+    - cron: "27 8 * * 5" # Run at 08:27 UTC on Fridays.
 
 jobs:
   update-otel: