fix: improve country creation logic

- Refactor the country creation process to use a block for setting
  the name attribute.
- Ensure that the name is set explicitly when a new country is
  created with the appropriate ISO code.

This change optimizes the way country records are created and
ensures the name is always correctly assigned during the
creation process.

lib/tasks/sync_geo_data.rake

@@ -82,7 +82,9 @@ namespace :geo do
       count += 1
 
       # 查找或初始化 Country
-      country = Country.find_or_create_by!(code: data["iso2"], name: data["name"])
+      country = Country.find_or_create_by!(code: data["iso2"]) do |c|
+        c.name = data["name"]
+      end
 
       # 更新 Country 属性
       country.update!(