fix(Sdk): 调整 WechatRpc 类中数组键名的命名风格

- 将 'goods_detail' 键名改为 'goodsDetail'，采用驼峰命名法
- 将 'goods_name' 键名改为 'goodsName'，同样采用驼峰命名法

src/Sdk/WechatRpc.php

@@ -76,8 +76,8 @@ final class WechatRpc
                     'amount' => (int)$money->getAmount(),
                     'fileType' => $type,
                     'uid' => $uid,
-                    'goods_detail' => [
-                        'goods_name' => $goodsName,
+                    'goodsDetail' => [
+                        'goodsName' => $goodsName,
                     ],
                     'number' => $number,
                 ],