Merge pull request #497 from fengzeroz/main

README: update submodule

README-CN.md

@@ -63,8 +63,9 @@ Neuron的层次结构图如下图所示：
 ### 编译
 
 ```shell
-$ git clone -- recursive https://github.com/emqx/neuron
+$ git clone https://github.com/emqx/neuron
 $ cd neuron
+$ git submodule update --init
 $ mkdir build && cd build
 $ cmake .. && make
 ```

README.md

@@ -62,8 +62,9 @@ The hierarchical layer diagram of Neuron is shown in the figure below:
 ## Build
 
 ```shell
-$ git clone -- recursive https://github.com/emqx/neuron
+$ git clone https://github.com/emqx/neuron
 $ cd neuron
+$ git submodule update --init
 $ mkdir build && cd build
 $ cmake .. && make
 ```