Fix(workflows/main.yml): reduce triggering range

Author: Ziyuan Chen (Simon Chen)
Date: 2023.09.04
Description:
- Don't trigger the workflow when modifying the 'doc/' or 'docs/' folder

Author: SimonCzy

.github/workflows/main.yml

@@ -7,6 +7,9 @@ name: CI
 on:
   push:
     branches: [ dev ]
+    paths-ignore:
+      - 'doc/**'      # Ignore all files and subdirectories under "doc/"
+      - 'docs/**'     # Ignore all files and subdirectories under "docs/"
   #pull_request:
   #  branches: [ dev ]