Improve readme headings

Author: Tim Mendoza

README.md

@@ -56,19 +56,19 @@ A mobile and web collaboration application built with Twilio Programmable Video.
 - [iOS App](https://github.com/twilio/twilio-video-app-ios)
 - [Android App](https://github.com/twilio/twilio-video-app-android)
 
-#### Token Server API Documentation
+## Token Server API Documentation
 
 The following section documents the application [token server](/src/video-token-server.js) used to provide [Programable Video access tokens](https://www.twilio.com/docs/video/tutorials/user-identity-access-tokens) to supported Twilio Video applications. The token server is deployed as a [Twilio Function](https://www.twilio.com/docs/runtime/functions).
 
 | Method | URL                |
 | ------ | ------------------ |
 | POST   | [`/token`](#token) |
 
-##### Authentication
+### Authentication
 
 The application token server requires an [authentication mechanism](#twilio-rtcappsvideodeploy---authentication-auth) to be specified when deploying. The following section documents each supported authentication mechanism.
 
-###### Passcode
+#### Passcode
 
 Each request is verified using a passcode generated at deploy time. Passcodes remain valid for one week. After the passcode expires, users can redeploy an application and a new passcode will be generated. The snippet below provides an example request body used by a supported application.
 
@@ -80,15 +80,15 @@ Each request is verified using a passcode generated at deploy time. Passcodes re
 }
 ```
 
-##### Token
+### Token
 
 Returns a Programmable Video Access token.
 
 ```shell
 POST /token
 ```
 
-###### Parameters
+#### Parameters
 
 | Name            | Type      | Description                                                                            |
 | --------------- | --------- | -------------------------------------------------------------------------------------- |
@@ -97,7 +97,7 @@ POST /token
 | `room_name`     | `string`  | A room name that will be used to create a token scoped to connecting to only one room. |
 | `create_room`   | `boolean` | (default: `true`) When false, a room will not be created when a token is requested.    |
 
-###### Success Responses
+#### Success Responses
 
 <table>
 <tr>
@@ -119,7 +119,7 @@ POST /token
 
 </table>
 
-###### Error Responses
+#### Error Responses
 
 <table>
 <tr>
@@ -189,23 +189,23 @@ POST /token
 
 </table>
 
-##### Recording Rules
+### Recording Rules
 
 Changes the Recording Rules for a given room SID.
 
 ```shell
 POST /recordingrules
 ```
 
-###### Parameters
+#### Parameters
 
 | Name       | Type     | Description                                                         |
 | ---------- | -------- | ------------------------------------------------------------------- |
 | `passcode` | `string` | **Required**. The application passcode.                             |
 | `room_sid` | `string` | **Required**. The SID of the room to change the recording rules of. |
 | `rules`    | `array`  | **Required**. An array of recording rules to apply to the room.     |
 
-###### Success Responses
+#### Success Responses
 
 <table>
 <tr>
@@ -234,7 +234,7 @@ POST /recordingrules
 
 </table>
 
-###### Error Responses
+#### Error Responses
 
 <table>
 <tr>