chore: modify workflows (apache#744)

* chore: modify workflows

* refactor by CR

Author: chunshao90

.github/workflows/ci.yml

@@ -14,8 +14,6 @@ on:
       - '.dockerignore'
       - 'docker/**'
   pull_request:
-    branches:
-      - main
     paths-ignore:
       - 'docs/**'
       - 'etc/**'

.github/workflows/coverage.yml

@@ -5,16 +5,14 @@ name: coverage
 on:
   workflow_dispatch:
   pull_request:
-    branches:
-      - main
     paths-ignore:
       - 'docs/**'
       - 'etc/**'
       - '**.md'
       - '.dockerignore'
       - 'docker/**'
   schedule:
-    - cron: '2 0 * * *'
+    - cron: '14 1/3 * * *'
 
 # Common environment variables
 env: