Move scheduled release forward to 2am PST. (#8113)

To ensure it is ready for the `iree-sample` daily test at 8am PST.
diff --git a/.github/workflows/schedule_candidate_release.yml b/.github/workflows/schedule_candidate_release.yml
index 700170e..2674546 100644
--- a/.github/workflows/schedule_candidate_release.yml
+++ b/.github/workflows/schedule_candidate_release.yml
@@ -2,7 +2,7 @@
 
 on:
   schedule:
-    - cron: '0 13 * * *'
+    - cron: '0 10 * * *'
 
   workflow_dispatch: