updated the extension b2b installation command and added info

src/extensions/b2b/index.md

@@ -15,9 +15,12 @@ For {{site.data.var.ece}} projects, see [Set up Magento B2B module]({{ site.base
 1. Change to your Magento installation directory and enter the following command to update your `composer.json` file and install the {{site.data.var.b2b}} extension:
 
    ```bash
-   composer require magento/extension-b2b
+   composer require magento/extension-b2b:<version>
    ```
 
+   {:.bs-callout-info}
+   You must specify a [Compatible Magento B2B version]({{ site.baseurl }}/release/availability.html#compatibility) in the command.
+
    If you get an error when trying to install the B2B module for a local instance of {{site.data.var.ee}} for example:
 
    ```terminal
@@ -60,7 +63,7 @@ For {{site.data.var.ece}} projects, see [Set up Magento B2B module]({{ site.base
    ```
 
  {:.bs-callout-info}
-  Note: In Production mode, you may receive a message to 'Please rerun Magento compile command'.  Enter the commands above. Magento does not prompt you to run the compile command in Developer mode.
+ In Production mode, you may receive a message to 'Please rerun Magento compile command'.  Enter the commands above. Magento does not prompt you to run the compile command in Developer mode.
 
 {:.bs-callout-info}
 After completing the installation, you must follow the [post-installation steps](#configure-b2b).