update packageName and dotnetVersion

Author: 2ynn

gen.yaml

@@ -14,8 +14,8 @@ csharp:
   additionalDependencies: []
   author: Speakeasy
   clientServerStatusCodesAsErrors: true
-  disableNamespacePascalCasingApr2024: false
-  dotnetVersion: net5.0
+  disableNamespacePascalCasingApr2024: true
+  dotnetVersion: net8.0
   flattenGlobalSecurity: false
   imports:
     option: openapi
@@ -28,5 +28,5 @@ csharp:
   inputModelSuffix: input
   maxMethodParams: 0
   outputModelSuffix: output
-  packageName: SpeakeasySDK
+  packageName: Speakeasy.Client.SDK
   responseFormat: envelope