Updating doc links (#299)

Co-authored-by: Mirza Sohail Hussain <mirza.sohailhussain@gmail.com>
Co-authored-by: Mike Chu <104384559+mikechu-optimizely@users.noreply.github.com>

Author: 3 people

README.md

@@ -6,9 +6,9 @@
 
 This repository houses the .Net based C# SDK for use with Optimizely Full Stack and Optimizely Rollouts.
 
-Optimizely Full Stack is A/B testing and feature flag management for product development teams. Experiment in any application. Make every feature on your roadmap an opportunity to learn. Learn more at https://www.optimizely.com/platform/full-stack/, or see the [documentation](https://docs.developers.optimizely.com/full-stack/docs).
+Optimizely Full Stack is A/B testing and feature flag management for product development teams. Experiment in any application. Make every feature on your roadmap an opportunity to learn. Learn more at https://www.optimizely.com/platform/full-stack/, or see the [documentation](https://docs.developers.optimizely.com/experimentation/v4.0.0-full-stack/docs/welcome).
 
-Optimizely Rollouts is free feature flags for development teams. Easily roll out and roll back features in any application without code deploys. Mitigate risk for every feature on your roadmap. Learn more at https://www.optimizely.com/rollouts/, or see the [documentation](https://docs.developers.optimizely.com/rollouts/docs).
+Optimizely Rollouts is free feature flags for development teams. Easily roll out and roll back features in any application without code deploys. Mitigate risk for every feature on your roadmap. Learn more at https://www.optimizely.com/rollouts/, or see the [documentation](https://docs.developers.optimizely.com/experimentation/v3.1.0-full-stack/docs/introduction-to-rollouts).
 
 ## Getting Started
 
@@ -34,7 +34,7 @@ and is merely illustrates how to use the SDK.
 
 #### Documentation
 
-See the Optimizely Full Stack [developer documentation](https://developers.optimizely.com/x/solutions/sdks/reference/?language=csharp) to learn how to set up your first Full Stack project and use the SDK.
+See the Optimizely Full Stack C# SDK [developer documentation](https://docs.developers.optimizely.com/experimentation/v4.0.0-full-stack/docs/csharp-sdk) to learn how to set up your first Full Stack project and use the SDK.
 
 #### Initialization