Updated webapi security module readme file

Author: CJ

app/code/Magento/WebapiSecurity/README.md

@@ -1,6 +1,15 @@
-# WebapiSecurity
+# Magento_WebapiSecurity module
+
+The **Magento_WebapiSecurity** module enables access management of some Web API resources.
+
+If checkbox enabled in backend through: `Stores -> Configuration -> Services -> Magento Web API -> Web Api Security` then the security of all the services outlined in `app/code/Magento/WebapiSecurity/etc/di.xml` would be loosened. You may modify this list to customize which services should follow this behavior.
 
-**WebapiSecurity** enables access management of some Web API resources.
-If checkbox is enabled in backend through: Stores -> Configuration -> Services -> Magento Web API -> Web Api Security
-then the security of all of the services outlined in app/code/Magento/WebapiSecurity/etc/di.xml would be loosened. You may modify this list to customize which services should follow this behavior.
 By loosening the security, these services would allow access anonymously (by anyone).
+
+## Installation details
+
+Before installing this module, note that the **Magento_WebapiSecurity** is dependent on the following modules:
+
+- `Magento_Webapi`
+
+Please find here [how to enable or disable modules in Magento 2](https://devdocs.magento.com/guides/v2.4/install-gde/install/cli/install-cli-subcommands-enable.html).