chore: optimize GitHub Pages deployment workflow

Author: shijiashuai

.github/workflows/ci.yml

@@ -8,6 +8,10 @@ on:
 permissions:
   contents: read
 
+concurrency:
+  group: ci-${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   lint:
     name: Lint

.github/workflows/pages.yml

@@ -3,6 +3,11 @@ name: Deploy to GitHub Pages
 on:
   push:
     branches: [main]
+    paths:
+      - '*.md'
+      - 'docs/**'
+      - '_config.yml'
+      - '.github/workflows/pages.yml'
   workflow_dispatch:
 
 permissions: