sops automation: fixes config dir specification, fix for fix

bin/update_sops.sh

@@ -171,7 +171,7 @@ function main(){
   keyfiles_dir="$(realpath "${keyfiles_dir}")"
   test -d "${keyfiles_dir}" || (echo "E: specify dir containing keyfiles; invalid dir: '${keyfiles_dir}'" && exit 1)
   sops_config=""
-  if [[ -n "${sops_cfg_dir:-}" ]]; then
+  if [[ -n "${sops_config_dir:-}" ]]; then
     sops_config_dir="$(realpath "${sops_config_dir}")"
     test -d "${sops_config_dir}" || (echo "E: specify dir containing .sops.yaml, invalid dir: '${sops_config_dir}'" && exit 1)
     sops_config="${sops_config_dir}/.sops.yaml"