fix(ofrep): call ReadAsStreamAsync without cancellation token for netstandard compatibility

Author: aldy505

src/OpenFeature.Providers.Ofrep/Client/OfrepClient.cs

@@ -550,7 +550,7 @@ private async Task<OfrepResponse<T>> ProcessOkResponseLegacyAsync<T>(string flag
     private static async Task<OfrepResponse<JsonElement>?> ReadRawResponseAsync(HttpResponseMessage response,
         CancellationToken cancellationToken)
     {
-        using var responseStream = await response.Content.ReadAsStreamAsync(cancellationToken).ConfigureAwait(false);
+        using var responseStream = await response.Content.ReadAsStreamAsync().ConfigureAwait(false);
         return await JsonSerializer.DeserializeAsync(responseStream,
                 OfrepJsonSerializerContext.Default.OfrepResponseJsonElement, cancellationToken)
             .ConfigureAwait(false);