doc: fix broken links (#13)

Author: cosmos-explorer

README.md

@@ -36,8 +36,8 @@ Before using the SDK, you need to obtain the environment secret and SDK URLs.
 
 Follow the documentation below to retrieve these values
 
-- [How to get the environment secret](https://docs.featbit.co/docs/sdk/faq#how-to-get-the-environment-secret)
-- [How to get the SDK URLs](https://docs.featbit.co/docs/sdk/faq#how-to-get-the-sdk-urls)
+- [How to get the environment secret](https://docs.featbit.co/sdk/faq#how-to-get-the-environment-secret)
+- [How to get the SDK URLs](https://docs.featbit.co/sdk/faq#how-to-get-the-sdk-urls)
 
 ### Quick Start
 
@@ -317,4 +317,4 @@ application or library is targeted to.
 
 ## See Also
 
-- [Connect To .NET Sdk](https://featbit.gitbook.io/docs/getting-started/4.-connect-an-sdk/server-side-sdks/.net-sdk)
+- [Connect To .NET Sdk](https://docs.featbit.co/getting-started/connect-an-sdk#net)