[otlp] Fix .NET Framework gRPC Export Client Default Success Response Status (open-telemetry#6099)

Author: rajkumar-rangaraj

src/OpenTelemetry.Exporter.OpenTelemetryProtocol/CHANGELOG.md

@@ -7,13 +7,18 @@ Notes](../../RELEASENOTES.md).
 
 ## Unreleased
 
+* Fixed a bug in .NET Framework gRPC export client where the default success
+  export response was incorrectly marked as false, now changed to true, ensuring
+  exports are correctly marked as successful.
+  ([#6099](https://github.com/open-telemetry/opentelemetry-dotnet/pull/6099))
+
 ## 1.11.1
 
 Released 2025-Jan-22
 
 * Fixed an issue where the OTLP gRPC exporter did not export logs, metrics, or
   traces in .NET Framework projects.
-  ([#6067](https://github.com/open-telemetry/opentelemetry-dotnet/issues/6067))
+  ([#6083](https://github.com/open-telemetry/opentelemetry-dotnet/pull/6083))
 
 ## 1.11.0
 

src/OpenTelemetry.Exporter.OpenTelemetryProtocol/Implementation/ExportClient/GrpcExportClient.cs

@@ -15,7 +15,7 @@ namespace OpenTelemetry.Exporter.OpenTelemetryProtocol.Implementation.ExportClie
 internal sealed class GrpcExportClient : IExportClient
 {
     private static readonly ExportClientGrpcResponse SuccessExportResponse = new(
-        success: false,
+        success: true,
         deadlineUtc: default,
         exception: null,
         status: null,