updated cron time

Signed-off-by: Alex Le <alex.le@improving.com>

Author: Aryex

.github/workflows/nightly.yml

@@ -2,7 +2,7 @@ name: C# Full Matrix Tests (Nightly)
 
 on:
     schedule:
-        - cron: "0 6 * * *"
+        - cron: "0 8 * * 1-5" # 1AM Mon - Fri
     workflow_dispatch:
 
 permissions: