[Fix] Fix `index.rst` for Chinese docs (#873)

* Fix index.rst for zh docs

* Change switch language

docs/index.rst

@@ -55,7 +55,7 @@ Welcome to MMDetection3D's documentation!
    api.rst
 
 .. toctree::
-   :caption: 语言切换
+   :caption: Switch Language
 
    switch_language.md
 

docs_zh-CN/index.rst

@@ -6,6 +6,7 @@ Welcome to MMDetection3D's documentation!
    :caption: 开始你的第一步
 
    getting_started.md
+   demo.md
    model_zoo.md
    data_preparation.md
 
@@ -13,10 +14,21 @@ Welcome to MMDetection3D's documentation!
    :maxdepth: 2
    :caption: 快速启动
 
-   0_demo.md
    1_exist_data_model.md
    2_new_data_model.md
 
+.. toctree::
+   :maxdepth: 2
+   :caption: 支持的任务
+
+   supported_tasks/index.rst
+
+.. toctree::
+   :maxdepth: 2
+   :caption: 数据集介绍
+
+   datasets/index.rst
+
 .. toctree::
    :maxdepth: 2
    :caption: 教程
@@ -33,17 +45,19 @@ Welcome to MMDetection3D's documentation!
    :maxdepth: 2
    :caption: 说明
 
+   benchmarks.md
    faq.md
+   compatibility.md
 
 .. toctree::
-   :caption: 语言切换
+   :caption: 接口文档（英文）
 
-   switch_language.md
+   api.rst
 
 .. toctree::
-   :caption: 接口文档（英文）
+   :caption: 语言切换
 
-   api.rst
+   switch_language.md
 
 Indices and tables
 ==================

docs_zh-CN/tutorials/index.rst

@@ -6,4 +6,3 @@
    data_pipeline.md
    customize_models.md
    customize_runtime.md
-   waymo.md