Feat: Supports docx in the MANUAL chunk method and docx, markdown, and PDF in the Q&A chunk method #3957 (#4741)

### What problem does this PR solve?

Feat: Supports docx in the MANUAL chunk method and docx, markdown, and
PDF in the Q&A chunk method #3957
### Type of change


- [x] New Feature (non-breaking change which adds functionality)

web/src/locales/zh.ts

@@ -198,7 +198,7 @@ export default {
       name: '知识库名称',
       photo: '知识库图片',
       description: '描述',
-      language: '语言',
+      language: '文档语言',
       languageMessage: '请输入语言',
       languagePlaceholder: '请输入语言',
       permissions: '权限',