fixing build issues related to docs

Author: FehintolaObafemi

src/Authentication/docs/AT-Pop.md renamed to docs/AT-Pop.md

@@ -1,16 +1,24 @@
 # Microsoft Graph PowerShell SDK: Access Token Proof of Possession (AT PoP) Capability
 
-## SYNOPSIS
+## Overview
 
 This README provides comprehensive details on the Access Token Proof of Possession (AT PoP) functionality introduced in the Microsoft Graph PowerShell SDK. This feature enhances security by binding tokens to specific HTTP methods and URIs, ensuring they are used only for their intended purposes.
 
-## KEY FEATURES
+## Table of Contents
+
+- [Key Features](#key-features)
+- [Installation](#installation)
+- [Configuration](#configuration)
+- [Usage Examples](#usage-examples)
+- [References](#references)
+
+## Key Features
 
 - **Access Token Proof of Possession (AT PoP)**: This feature binds tokens to specific HTTP methods and URIs, preventing misuse of tokens by ensuring they are used only for the intended HTTP requests.
 - **Updated Dependencies**: Compatibility improvements with recent library changes.
 - **Enhanced Token Acquisition Options**: Users can now specify the HTTP method and URI during token acquisition to further secure token usage.
 
-### TOKEN ACQUISITION BEHAVIORS
+### Token acquisition behaviors
 
 | Condition | Unbound (default) | Bound (PoP) |
 |-----------|-----------|-----------|
@@ -20,7 +28,7 @@ This README provides comprehensive details on the Access Token Proof of Possessi
 | Existing expired token, below max token refreshes | New token, silent | New token, silent |
 | Existing expired token, exceeded max refreshes | New token, interactive | New token, interactive |
 
-## INSTALLATION
+## Installation
 
 To install the Microsoft Graph PowerShell SDK with the latest updates, use the following command:
 
@@ -30,7 +38,7 @@ Install-Module -Name Microsoft.Graph -AllowClobber -Force
 
 Ensure you are using the latest version to access the AT PoP functionality.
 
-## CONFIGURATION
+## Configuration
 
 ### Enabling Access Token Proof of Possession
 
@@ -44,7 +52,7 @@ Connect-MgGraph
 
 This configuration ensures that the acquired token is only valid for the specified HTTP method and URI.
 
-## EXAMPLES
+## Usage Examples
 
 ### Example 1:
 
@@ -66,6 +74,6 @@ Connect-MgGraph
 Invoke-MgGraphRequest -Uri "https://graph.microsoft.com/v1.0/me/sendMail" -Method POST -Debug
 ```
 
-## REFERENCES
+## References
 
 This README provides a detailed guide on the new AT PoP functionality, offering users the ability to secure their token usage effectively. If you have any questions or need further assistance, please refer to the official [Microsoft Graph PowerShell SDK documentation](https://docs.microsoft.com/en-us/powershell/microsoftgraph/).