refactor(tournaments): 更新权限控制

- 将 'system:tournaments:edit' 权限更改为 'demo:tournaments:edit'
- 将 'system:tournaments:remove' 权限更改为 'demo:tournaments:remove'

src/views/demo/tournaments/index.vue

@@ -79,10 +79,10 @@
         <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
           <template #default="scope">
             <el-tooltip content="修改" placement="top">
-              <el-button link type="primary" icon="Edit" @click="handleUpdate(scope.row)" v-hasPermi="['system:tournaments:edit']"></el-button>
+              <el-button link type="primary" icon="Edit" @click="handleUpdate(scope.row)" v-hasPermi="['demo:tournaments:edit']"></el-button>
             </el-tooltip>
             <el-tooltip content="删除" placement="top">
-              <el-button link type="primary" icon="Delete" @click="handleDelete(scope.row)" v-hasPermi="['system:tournaments:remove']"></el-button>
+              <el-button link type="primary" icon="Delete" @click="handleDelete(scope.row)" v-hasPermi="['demo:tournaments:remove']"></el-button>
             </el-tooltip>
           </template>
         </el-table-column>