Fix in to at and initialize submodules first before the doxygen script.

Author: Ubuntu

README.md

@@ -378,7 +378,7 @@ You must also download the Root CA certificate provided by the ngrok https link
 
 ## Generating Documentation
 
-The Doxygen references were created using Doxygen version 1.8.20. To generate the Doxygen pages, use the provided Python script in [tools/doxygen/generate_docs.py](tools/doxygen/generate_docs.py). Please ensure that each of the library submodules under libraries/standard/ and libraries/aws are cloned before using this script.
+The Doxygen references were created using Doxygen version 1.8.20. To generate the Doxygen pages, use the provided Python script at [tools/doxygen/generate_docs.py](tools/doxygen/generate_docs.py). Please ensure that each of the library submodules under libraries/standard/ and libraries/aws are cloned before using this script.
 
 ```sh
 cd <CSDK_ROOT>