Spread out schedule workflow triggers

In order to catch breakage caused by external changes, the project's GitHub Actions workflows have a schedule event
trigger.

Previously, all the triggers were configured to trigger at the same time. It seems that this might cause spurious
workflow run failures due to rate limiting or anti-DDoS systems. In order to avoid that, the triggers are configured to
occur at various times.

Author: per1234

.github/workflows/check-go-task.yml

@@ -23,8 +23,8 @@ on:
       - "**/go.sum"
       - "**.go"
   schedule:
-    # Run every Tuesday at 8 AM UTC to catch breakage caused by changes to tools.
-    - cron: "0 8 * * TUE"
+    # Run periodically to catch breakage caused by external changes.
+    - cron: "0 7 * * WED"
   workflow_dispatch:
   repository_dispatch:
 

.github/workflows/test-go-integration-task.yml

@@ -31,8 +31,8 @@ on:
       - "pyproject.toml"
       - "tests/**"
   schedule:
-    # Run daily at 8 AM UTC to catch breakage resulting from changes to Arduino Lint.
-    - cron: "0 8 * * *"
+    # Run periodically to catch breakage caused by external changes.
+    - cron: "0 10 * * WED"
   workflow_dispatch:
     inputs:
       arduino-lint-ref: