fix(doc_eino): loader interface path

Author: meguminnnnnnnnn

content/en/docs/eino/core_modules/components/document_loader_guide/_index.md

@@ -18,7 +18,7 @@ Document Loader is a component used for loading documents. Its primary function
 
 ### **Interface Definition**
 
-> Code Location: eino/components/document/parser/interface.go
+> Code Location: eino/components/document/interface.go
 
 ```go
 type Loader interface {

content/zh/docs/eino/core_modules/components/document_loader_guide/_index.md

@@ -18,7 +18,7 @@ Document Loader 是一个用于加载文档的组件。它的主要作用是从
 
 ### **接口定义**
 
-> 代码位置：eino/components/document/parser/interface.go
+> 代码位置：eino/components/document/interface.go
 
 ```go
 type Loader interface {