[fix] change how telemetry api handles auth header

src/Dimo.Client/Services/Telemetry/TelemetryService.cs

@@ -43,7 +43,8 @@ public async Task<T> ExecuteQueryAsync<T>(
                 OperationName = queryName,
                 Variables = variables
             };
-            _client.HttpClient.DefaultRequestHeaders.Add("Authorization", $"Bearer {authToken}");
+
+            _client.HttpClient.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", authToken);
 
             var response = await _client.SendQueryAsync<T>(graphQlRequest, cancellationToken);