[Bug]: The code is not precise about the use of the client assigned to _

### File Name

https://colab.sandbox.google.com/github/GoogleCloudPlatform/generative-ai/blob/main/gemini/agent-engine/memory/get_started_with_memory_bank_adk.ipynb

### What happened?

A bug happened! by default it is assigned to us-central1, even if location variable is different

### Relevant log output

```shell
All of the agents are created on us-central1
```

### Code of Conduct

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