Tweak dependabot schedule (#205)

Author: kevinwcyu

.github/dependabot.yml

@@ -1,17 +1,11 @@
 version: 2
 updates:
-  - package-ecosystem: 'github-actions'
-    directory: '/'
-    schedule:
-      interval: 'daily'
-    cooldown:
-      default-days: 7
-      exclude:
-        - 'grafana/*'
   - package-ecosystem: 'npm'
     directory: '/'
     schedule:
       interval: 'daily'
+      time: '10:00'
+    open-pull-requests-limit: 3
     cooldown:
       semver-major-days: 30
       semver-minor-days: 14
@@ -25,6 +19,16 @@ updates:
           - '@grafana/runtime'
           - '@grafana/schema'
           - '@grafana/ui'
+  - package-ecosystem: 'github-actions'
+    directory: '/'
+    schedule:
+      interval: 'daily'
+      time: '12:00'
+    open-pull-requests-limit: 3
+    cooldown:
+      default-days: 7
+      exclude:
+        - 'grafana/*'
 
     # Ignore dependencies that need to be updated manually for compatibility reasons
     ignore: