Fix shellcheck lint

cache.sh

@@ -3,8 +3,9 @@ set -eo pipefail
 
 files=()
 
+# shellcheck disable=SC2044
 for vars in $(find distros/ -name '*.pkrvars.hcl'); do
-  file=$(echo var.iso.url | packer console -var-file=${vars} -config-type=hcl2 sources/)
+  file=$(echo var.iso.url | packer console -var-file="${vars}" -config-type=hcl2 sources/)
   base="$(basename "${file}")"
   if [ -e "cache/${base}" ]; then
     echo "Found cache/${base} already"
@@ -15,6 +16,6 @@ done
 
 mkdir -p cache
 pushd cache
-echo "Downloading ${files[@]}"
+echo "Downloading ${files[*]}"
 curl --parallel -L "${files[@]}"
 popd