update to bi weekly.

Author: sayakpaul

.github/workflows/benchmark.yml

@@ -3,7 +3,7 @@ name: Benchmarking tests
 on:
   workflow_dispatch:
   schedule:
-    - cron: "0 17 * * 1" # every monday at 5 PM.
+    - cron: "30 1 1,15 * *" # every 2 weeks on the 1st and the 15th of every month at 1:30 AM
 
 env:
   DIFFUSERS_IS_CI: yes