Update acme.sh

revert only when there is no `--server` specified.

acme.sh

@@ -5271,6 +5271,7 @@ renew() {
   fi
 
   #revert from staging CAs back to production CAs
+  if [ -z "$ACME_DIRECTORY" ]; then
     case "$Le_API" in
 
     "$CA_LETSENCRYPT_V2_TEST")
@@ -5286,6 +5287,7 @@ renew() {
       Le_API="$CA_GOOGLE"
       ;;
     esac
+  fi
 
   if [ "$Le_API" ]; then
     if [ "$Le_API" != "$ACME_DIRECTORY" ]; then