Update README.md

Author: imagekitio

README.md

@@ -12,9 +12,8 @@ ImageKit React SDK allows you to resize, optimize, deliver, and upload images an
 
 ImageKit is a complete media storage, optimization, and transformation solution that comes with an image and video CDN. It can be integrated with your existing infrastructure - storage like AWS S3, web servers, your CDN, and custom domain names, allowing you to deliver optimized images in minutes with minimal code changes.
 
-## Changelog - SDK Version 3.0.0
-### Breaking changes
-**1. Authentication Process Update:**
+## Breaking changes - Upgrading from 2.x to 3.x version
+3.x version has breaking changes as listed below.
 * In version 3.0.0, we have deprecated the use of the `authenticationEndpoint` parameter. Instead, the SDK now introduces a new parameter named `authenticator`. This parameter expects an asynchronous function that resolves with an object containing the necessary security parameters i.e `signature`, `token`, and `expire`.
 * Now `ref` needs to be passed instead of `inputRef` in the IKUpload component