fixed test

Author: martinkuba

plugins/node/opentelemetry-instrumentation-aws-lambda/test/integrations/lambda-handler.test.ts

@@ -534,7 +534,7 @@ describe('lambda handler', () => {
     });
 
     it('can extract context from lambda context env variable using a global propagator', async () => {
-      process.env[traceContextEnvironmentKey] = sampledAwsHeader;
+      process.env['_X_AMZN_TRACE_ID'] = sampledAwsHeader;
       propagation.setGlobalPropagator(new AWSXRayLambdaPropagator());
       initializeHandler('lambda-test/async.handler');