fix build sh

Author: wuchong

website/build_versioned_docs.sh

@@ -89,6 +89,13 @@ sidebar_json='{
  ]
 }'
 
+# handle OS-specific cp command
+if [ "$(uname)" == "Darwin" ]; then
+  CP_CMD="cp -R website/docs/ "
+else
+  CP_CMD="cp -r website/docs/* "
+fi
+
 # Iterate over each matched branch
 for branch in $branches; do
   # Remove the remote branch prefix "remotes/origin/"
@@ -111,7 +118,7 @@ for branch in $branches; do
     mkdir -p "$version_dir"
 
     # Copy the website/docs directory to the target directory
-    cp -r "website/docs/" "$version_dir/" || { echo "Failed to copy for branch: $clean_branch_name"; continue; }
+    $CP_CMD "$version_dir/" || { echo "Failed to copy for branch: $clean_branch_name"; continue; }
     echo "Copied documentation for branch '$clean_branch_name' to '$version_dir'"
   else
     echo "The website/docs directory does not exist in branch '$clean_branch_name', skipping..."