chore(init-tests): update go test (#24312)

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*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: TheRealAmazonKendra

packages/@aws-cdk-testing/cli-integ/README.md

@@ -33,6 +33,7 @@ tests/
 ├── init-python
 ├── init-typescript-app
 ├── init-typescript-lib
+├── init-go
 └── uberpackage
 ```