Stagger nightly trigger schedule. (#104)

Run evergreen@main at 10pm
Run non main nightlies at 9:30pm

b/278455839

.github/workflows/android.yaml

@@ -11,6 +11,7 @@ on:
       - main
       - feature/*
   schedule:
+    # GMT timezone.
     - cron: '0 4 * * *'
   workflow_dispatch:
     inputs:

.github/workflows/evergreen.yaml

@@ -11,7 +11,8 @@ on:
       - main
       - feature/*
   schedule:
-    - cron: '0 4 * * *'
+    # GMT timezone.
+    - cron: '0 5 * * *'
   workflow_dispatch:
     inputs:
       nightly:

.github/workflows/linux.yaml

@@ -11,6 +11,7 @@ on:
       - main
       - feature/*
   schedule:
+    # GMT timezone.
     - cron: '0 4 * * *'
   workflow_dispatch:
     inputs:

.github/workflows/nightly_trigger.yaml

@@ -2,7 +2,8 @@ name: nightly_trigger
 
 on:
   schedule:
-    - cron: '0 4 * * *'
+    # GMT timezone.
+    - cron: '30 4 * * *'
   workflow_dispatch:
 
 jobs:

.github/workflows/raspi-2.yaml

@@ -11,6 +11,7 @@ on:
       - main
       - feature/*
   schedule:
+    # GMT timezone.
     - cron: '0 4 * * *'
   workflow_dispatch:
     inputs:

.github/workflows/win32.yaml

@@ -11,6 +11,7 @@ on:
       - main
       - feature/*
   schedule:
+    # GTM timezone.
     - cron: '0 4 * * *'
   workflow_dispatch:
     inputs: