Update README.md (#305)

Add information about the repo moving to a new organization

README.md

@@ -5,6 +5,11 @@
 
 For more information about the API, please visit the official documentation at <a href="https://developer.fortnox.se/documentation/">https://developer.fortnox.se/</a>.
 
+> [!NOTE]
+> **2024-10-04:** This repository has been moved from the FortnoxAB organization to the SoftwerkAB organization. The repository name has also been changed from **csharp-api-sdk** to **fortnox-csharp-api-sdk**.
+> 
+> If you wish to continue to contribute to the repository you may need to clone it again or change your upstream using `git remote set-url origin "https://github.com/softwerkab/fortnox-csharp-api-sdk.git"`. More information can be found [here](https://docs.github.com/en/get-started/getting-started-with-git/managing-remote-repositories#changing-a-remote-repositorys-url).
+
 ## Get started
 * Register as a <a href="https://developer.fortnox.se/" target="_blank">Fortnox developer</a>
 * Install the NuGet package [Fortnox.NET.SDK](https://www.nuget.org/packages/Fortnox.NET.SDK/)