[FLINK-37176][docs] Support mac binary for setup_hugo

docs/setup_hugo.sh

@@ -18,8 +18,19 @@
 ################################################################################
 
 # setup hugo
-HUGO_REPO=https://github.com/gohugoio/hugo/releases/download/v0.110.0/hugo_extended_0.110.0_Linux-64bit.tar.gz
-HUGO_ARTIFACT=hugo_extended_0.110.0_Linux-64bit.tar.gz
+
+# Detect Operating System
+OS="Linux"
+[[ "$OSTYPE" == "darwin"* ]] && OS="Mac"
+
+# Setup Hugo based on OS
+if [ "$OS" = "Mac" ]; then
+    HUGO_ARTIFACT="hugo_extended_0.110.0_darwin-universal.tar.gz"
+else
+    HUGO_ARTIFACT="hugo_extended_0.110.0_Linux-64bit.tar.gz"
+fi
+
+HUGO_REPO="https://github.com/gohugoio/hugo/releases/download/v0.110.0/${HUGO_ARTIFACT}"
 if ! curl --fail -OL $HUGO_REPO ; then
 	echo "Failed to download Hugo binary"
 	exit 1