add smithy team codeowners (smithy-lang#612)

* add smithy team codeowner

* Update CODEOWNERS

Author: kuhe

.github/CODEOWNERS

@@ -2,12 +2,12 @@
 * @awslabs/aws-sdk-js-team
 
 # These libraries are only intended for use with the SSDK.
-smithy-typescript-ssdk-libs/* @adamthom-amzn @gosar @JordonPhillips
+smithy-typescript-ssdk-libs/* @awslabs/smithy
 
 # These integs tests are mostly for the SSDK integrations
-smithy-typescript-integ-tests/* @adamthom-amzn @gosar @JordonPhillips
+smithy-typescript-integ-tests/* @awslabs/smithy
 
 # These are all specific to SSDK functionality.
-smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/ServerCommandGenerator.java @adamthom-amzn @gosar @JordonPhillips
-smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/ServerGenerator.java @adamthom-amzn @gosar @JordonPhillips
-smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/ServerSymbolVisitor.java @adamthom-amzn @gosar @JordonPhillips
+smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/ServerCommandGenerator.java @awslabs/smithy
+smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/ServerGenerator.java @awslabs/smithy
+smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/ServerSymbolVisitor.java @awslabs/smithy