refactor: 更新模块名称格式

- 将模块名称从 dcatadmin_demo-module 修改为 dcatadmin-demo-module
- 此修改统一了模块名称的格式，提高了代码的一致性和可读性

composer.json

@@ -1,5 +1,5 @@
 {
-    "name": "dcatadmin2/dcatadmin_demo-module",
+    "name": "dcatadmin2/DcatadminDemo-module",
     "description": "Dcat Admin Demo Module - A comprehensive demonstration module for Dcat Admin",
     "type": "laravel-module",
     "keywords": ["laravel", "dcat-admin", "module", "demo"],