Update ToC

Author: ahangarha

README.md

@@ -41,40 +41,44 @@ Read the [full review here](https://clutch.co/profile/shakacode#reviews?sort_by=
 <!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
 ## Contents
 
-- [Get started with Shakapacker](#get-started-with-shakapacker)
-  - [Component name](#component-name)
-  - [File naming](#file-naming)
-  - [Typescript support](#typescript-support)
-  - [Test component](#test-component)
-- [Use with Asset Pipeline](#use-with-asset-pipeline)
-  - [Custom JSX Transformer](#custom-jsx-transformer)
-    - [Transform Plugin Options](#transform-plugin-options)
-  - [React.js versions](#reactjs-versions)
-- [View Helper](#view-helper)
-    - [Custom View Helper](#custom-view-helper)
-- [UJS](#ujs)
-  - [Mounting & Unmounting](#mounting--unmounting)
-  - [Event Handling](#event-handling)
-  - [`getConstructor`](#getconstructor)
-- [Server-Side Rendering](#server-side-rendering)
-    - [Configuration](#configuration)
-    - [JavaScript State](#javascript-state)
-    - [Custom Server Renderer](#custom-server-renderer)
-- [Controller Actions](#controller-actions)
-- [Component Generator](#component-generator)
-    - [Use with JBuilder](#use-with-jbuilder)
-  - [Camelize Props](#camelize-props)
-  - [Changing Component Templates](#changing-component-templates)
-- [Upgrading](#upgrading)
-  - [2.7 to 3.0](#27-to-30)
-  - [2.3 to 2.4](#23-to-24)
-- [Common Errors](#common-errors)
-  - [Getting warning for `Can't resolve 'react-dom/client'` in React < 18](#getting-warning-for-cant-resolve-react-domclient-in-react--18)
-  - [Undefined Set](#undefined-set)
-  - [Using TheRubyRacer](#using-therubyracer)
-  - [HMR](#hmr)
-- [Related Projects](#related-projects)
-- [Contributing](#contributing)
+  - [Get started with Shakapacker](#get-started-with-shakapacker)
+    - [Component name](#component-name)
+    - [File naming](#file-naming)
+    - [Typescript support](#typescript-support)
+    - [Test component](#test-component)
+  - [Use with Asset Pipeline](#use-with-asset-pipeline)
+    - [Custom JSX Transformer](#custom-jsx-transformer)
+      - [Transform Plugin Options](#transform-plugin-options)
+    - [React.js versions](#reactjs-versions)
+  - [View Helper](#view-helper)
+      - [Custom View Helper](#custom-view-helper)
+  - [UJS](#ujs)
+    - [Mounting & Unmounting](#mounting--unmounting)
+    - [Event Handling](#event-handling)
+    - [`getConstructor`](#getconstructor)
+  - [Server-Side Rendering](#server-side-rendering)
+      - [Configuration](#configuration)
+      - [JavaScript State](#javascript-state)
+      - [Custom Server Renderer](#custom-server-renderer)
+  - [Controller Actions](#controller-actions)
+  - [Component Generator](#component-generator)
+      - [Use with JBuilder](#use-with-jbuilder)
+    - [Camelize Props](#camelize-props)
+    - [Changing Component Templates](#changing-component-templates)
+  - [Upgrading](#upgrading)
+    - [2.7 to 3.0](#27-to-30)
+    - [2.3 to 2.4](#23-to-24)
+  - [Migrating from `react-rails` to `react_on_rails`](#migrating-from-react-rails-to-react_on_rails)
+    - [Why to migrate?](#why-to-migrate)
+    - [Steps to migrate](#steps-to-migrate)
+  - [Common Errors](#common-errors)
+    - [Getting warning for `Can't resolve 'react-dom/client'` in React < 18](#getting-warning-for-cant-resolve-react-domclient-in-react--18)
+    - [Undefined Set](#undefined-set)
+    - [Using TheRubyRacer](#using-therubyracer)
+    - [HMR](#hmr)
+  - [Related Projects](#related-projects)
+  - [Contributing](#contributing)
+- [Supporters](#supporters)
 
 <!-- END doctoc generated TOC please keep comment here to allow auto update -->