fix: [www] using server-aliases with letsencrypt would trigger an error about "empty label".

Asking ``-y`` to shyaml would include rogue ``...`` in the output.

apache/lib/common

@@ -217,7 +217,7 @@ ssl_plugin_cert-provider_prepare() {
     options=$(yaml_key_val_str "options" "$cfg") || return 1
     service_config=$(yaml_key_val_str "$service" "$options")
     compose --debug --add-compose-content "$service_config" run --rm --service-ports "$service" \
-            crt create "$DOMAIN" $(echo "$SERVER_ALIAS" | shyaml -y get-values 2>/dev/null) || {
+            crt create "$DOMAIN" $(echo "$SERVER_ALIAS" | shyaml get-values 2>/dev/null) || {
         err "Failed to launch letsencrypt for certificate creation."
         return 1
     }