fix api docs bugs test=document_fix

Author: TCChenlong

docs/dev_guides/index_cn.rst

@@ -11,6 +11,7 @@
 - `Git 操作指南 <./git_guides/index_cn.html>`_ : Git 操作相关说明与Paddle CI 手册。
 - `编译安装 <https://www.paddlepaddle.org.cn/documentation/docs/zh/install/compile/fromsource.html>`_ : 如何从源码编译安装Paddle。
 - `API开发指南 <./api_contributing_guides/api_contributing_guides_cn.html>`_ : API开发相关说明。
+- `Kernel Primitives API <./kernel_primitive_api/index_cn.html>`_ : 介绍 PaddlePaddle 为加快算子开发提供的 Block 级 CUDA 函数。
 - `曙光开发指南 <./sugon/index_cn.html>`_ : 曙光开发相关说明。
 - `自定义新硬件接入指南 <./custom_device_docs/index_cn.html>`_: 介绍如何通过自定义硬件功能为飞桨接入新硬件后端。
 - `文档贡献指南 <./docs_contributing_guides_cn.html>`_ : 飞桨文档贡献指南。
@@ -22,6 +23,7 @@
     style_guides_cn.md
     git_guides/index_cn.rst
     api_contributing_guides/api_contributing_guides_cn.rst
+    kernel_primitive_api/index_cn.rst
     sugon/index_cn.rst
     custom_device_docs/index_cn.rst
     docs_contributing_guides_cn.md

docs/dev_guides/index_en.rst

@@ -6,10 +6,13 @@ We very much welcome you to participate in the construction of the paddle. The f
 
 Similarly, if you feel that this document is missing, or that the description is unclear, we also welcome you to contribute to this series of documents.
 
+- `Kernel Primitives API <./kernel_primitive_api/index_cn.html>`_ : Introduce the block-level CUDA functions provided by PaddlePaddle to speed up operator development.
 - `custom_device_docs <./custom_device_docs/index_en.html>`_ : Contribution guidelines overview.
 
 
 ..  toctree::
     :hidden:
 
+
+    kernel_primitive_api/index_en.rst
     custom_device_docs/index_en.rst