fix option --update for dependency_age.sh

ci/dependency_age.sh

@@ -20,7 +20,7 @@ for package in packages/* ; do
     if [ "${newest_version}"  == "${actual_version}" ] ; then
       echo "${color_green}newest${color_reset}"
     else
-	  if [ "$1" = "--upgrade" ] ; then
+	  if [ "$1" = "--update" ] ; then
         sed -i "s/${dependency} = \"${actual_version}\"/${dependency} = \"${last_version}\"/g" "${package}/Cargo.toml"
 		echo "${color_blue}old, updated to ${last_version}${color_reset}" 
 	  else