Update main.yml

Author: Liudon

.github/workflows/main.yml

@@ -51,7 +51,7 @@ jobs:
       - name: Compress Image
         uses: jruipinto/ImageMagick-action@v1
         with: 
-          command: find ./content/posts/ -type f $ -iname "*.jpg" -o -iname "*.jpeg" -o -iname "*.png" $ -exec sh -c 'for img; do convert "$img" "${img%.*}.webp" && convert "$img" "${img%.*}.avif"; done' _ {} +
+          command: find ./content/posts/ -type f \( -name "*.jpg" -o -name "*.png" -o -name "*.jpeg" \) -exec convert {} {}.webp && convert {} {}.avif \;
 
   github_pages:
     name: Build and Publish Github Pages