docs: Revise .NET version support details (#40)

Author: andrewabest

README.md

@@ -1,16 +1,13 @@
 # Octopus Deploy OpenFeature provider for .NET  
 
-The OctopusDeploy .NET [OpenFeature provider
-](https://openfeature.dev/docs/reference/concepts/provider/)
+The OctopusDeploy .NET [OpenFeature provider](https://openfeature.dev/docs/reference/concepts/provider/)
 
 ## About Octopus Deploy 
 
 [Octopus Deploy](https://octopus.com) is a sophisticated, best-of-breed continuous delivery (CD) platform for modern software teams. Octopus offers powerful release orchestration, deployment automation, and runbook automation, while handling the scale, complexity and governance expectations of even the largest organizations with the most complex deployment challenges.
 
 ## Supported .NET Versions
-This SDK is currently built for .NET 8.0, meaning it will run on .NET 8.0 and above. 
-
-If you require support for additional versions, please raise an issue.
+This SDK targets netstandard 2.0 for broad compatibility. You can review compatibility [on Microsoft's website](https://learn.microsoft.com/en-us/dotnet/standard/net-standard?tabs=net-standard-2-0).
 
 ## Getting Started
 
@@ -38,4 +35,4 @@ if (await client.GetBooleanValue("to-the-moon-feature", false))
 }
 ```
 
-For information on using the OpenFeature client please refer to the [OpenFeature Documentation](https://docs.openfeature.dev/docs/reference/concepts/evaluation-api/).
+For information on using the OpenFeature client please refer to the [OpenFeature Documentation](https://docs.openfeature.dev/docs/reference/concepts/evaluation-api/).