chore: add translate dev team for translate samples (#3938)

Author: iennae

CODEOWNERS

@@ -48,3 +48,4 @@ retail @GoogleCloudPlatform/cloud-retail-team @GoogleCloudPlatform/nodejs-sample
 media @GoogleCloudPlatform/cloud-media-team @GoogleCloudPlatform/nodejs-samples-reviewers @GoogleCloudPlatform/cloud-samples-reviewers
 healthcare @GoogleCloudPlatform/healthcare-life-sciences @GoogleCloudPlatform/nodejs-samples-reviewers @GoogleCloudPlatform/cloud-samples-reviewers
 routeoptimization @GoogleCloudPlatform/geo-routeoptimization @GoogleCloudPlatform/nodejs-samples-reviewers @GoogleCloudPlatform/cloud-samples-reviewers
+translate @GoogleCloudPlatform/nodejs-samples-reviewers @GoogleCloudPlatform/cloud-samples-reviewers @GoogleCloudPlatform/cloud-ml-translate-dev