Update forms field component to handle multiple select

- Updated the `component.rb` file to handle multiple select fields.

Author: JustShah

admin/app/components/solidus_admin/ui/forms/field/component.rb

@@ -41,7 +41,7 @@ def self.select(form, method, choices, object: nil, hint: nil, tip: nil, size: :
       hint:,
       tip:,
       size: size,
-      name: "#{object_name}[#{method}]",
+      name: "#{object_name}[#{method}]#{'[]' if attributes[:multiple].present?}",
       choices:,
       value: (object.public_send(method) if object.respond_to?(method)),
       error: (errors.to_sentence.capitalize if errors),