fix: create deployment branch only when it doesn't exist

scripts/zola.sh

@@ -97,7 +97,14 @@ deploy() {
 	original_branch=$(git branch --show-current)
 	tmp_dir=$(mktemp -d)
 	cp -r $2/* $tmp_dir
-	git checkout --orphan $1
+
+	if [[ -z $(git branch --list $1) ]]
+	then
+		git checkout --orphan $1
+	else
+		git checkout $1 
+	fi
+
 	git rm -rf .
 	/bin/rm -rf *
 	cp -r $tmp_dir/* .