feat: 修复知识库上传默认目录

yudao-ui-admin-vue3/src/views/ai/knowledge/document/form/FormStep.vue

@@ -79,9 +79,6 @@ const formRules = ref({
   name: [
     { required: true, message: '请输入目录名称', trigger: 'blur' },
     { min: 1, max: 100, message: '目录名称长度在 1 到 100 个字符', trigger: 'blur' }
-  ],
-  parentId: [
-    { required: true, message: '请选择上级目录', trigger: 'blur' }
   ]
 })