[CI] skip CI when some specific files were changed (#154)

.github/workflows/build.yml

@@ -3,7 +3,22 @@
 
 name: build
 
-on: [push, pull_request]
+on:
+  push:
+    paths-ignore:
+      - 'README.md'
+      - 'README_zh-CN.md'
+      - 'docs/**'
+      - 'model-index.yml'
+      - 'configs/**.md'
+
+  pull_request:
+    paths-ignore:
+      - 'README.md'
+      - 'README_zh-CN.md'
+      - 'docs/**'
+      - 'model-index.yml'
+      - 'configs/**.md'
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}