Added information to CODEOWNERS

Author: TetyanaYahodska

.github/CODEOWNERS

@@ -44,6 +44,7 @@
 /security-command-center         @GoogleCloudPlatform/java-samples-reviewers @yoshi-approver @GoogleCloudPlatform/cloud-samples-reviewers @GoogleCloudPlatform/dee-infra @GoogleCloudPlatform/gcp-security-command-center
 /servicedirectory                @GoogleCloudPlatform/java-samples-reviewers @yoshi-approver @GoogleCloudPlatform/cloud-samples-reviewers @GoogleCloudPlatform/dee-infra
 /webrisk                         @GoogleCloudPlatform/java-samples-reviewers @yoshi-approver @GoogleCloudPlatform/cloud-samples-reviewers @GoogleCloudPlatform/dee-infra
+/tpu                             @GoogleCloudPlatform/java-samples-reviewers @yoshi-approver @GoogleCloudPlatform/cloud-samples-reviewers @GoogleCloudPlatform/dee-infra
 
 # DEE Platform Ops (DEEPO)
 /errorreporting                  @GoogleCloudPlatform/java-samples-reviewers @yoshi-approver @GoogleCloudPlatform/cloud-samples-reviewers