doc: added link to release note to readme

Author: payetools

README.md

@@ -8,7 +8,13 @@ initiated by Svix and supported by other industry participants including Zapier,
 This repo extends the [C# reference implementation](https://github.com/standard-webhooks/standard-webhooks/tree/main/libraries/csharp),
 providing a maintained (nuget package) along with some helpful features for ASP.NET Core developers.
 
-It is supported on all current .NET Core platforms (.NET 6.0, .NET 8.0).
+It is supported on all current .NET Core platforms (.NET 8.0, NET 9.0).
+
+## Releases
+
+See the [release notes](doc/releases.md) for details of changes in each release.
+
+## Functionality
 
 ### Generating HttpContent for a Webhook
 ```csharp

StandardWebhooks.sln

@@ -15,6 +15,7 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "StandardWebhooks.Tests", "t
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "doc", "doc", "{B68EAE5C-8329-4D99-8D7C-B70D82937248}"
 	ProjectSection(SolutionItems) = preProject
+		README.md = README.md
 		doc\releases.md = doc\releases.md
 	EndProjectSection
 EndProject