[GSoC2024] fixed path of gen folder which is incorrect in cvat-sdk do…

…cs (#7586)

Fixes #7585 

Fixed the path to `gen` folder which is incorrect in cvat-sdk docs.

site/content/en/docs/api_sdk/sdk/developer-guide.md

@@ -10,7 +10,7 @@ description: ''
 This package contains manually written and autogenerated files. We store only sources in
 the repository. To get the full package, one need to generate missing package files.
 
-## Package file layout
+## Layout of the cvat-sdk directory
 
 - `gen/` - generator files
 - `cvat_sdk/` - Python package root
@@ -21,12 +21,12 @@ the repository. To get the full package, one need to generate missing package fi
 
 1. Install generator dependencies:
    ```bash
-   pip install -r gen/requirements.txt
+   pip install -r cvat-sdk/gen/requirements.txt
    ```
 
 1. Generate package code (call from the package root directory!):
    ```bash
-   ./gen/generate.sh
+   ./cvat-sdk/gen/generate.sh
    ```
 
 1. Install the packages: