Update app.yaml

[adityasri03]

Description

Fixes #<ISSUE-NUMBER>

Note: Before submitting a pull request, please open an issue for discussion if you are not associated with Google.

Checklist

• [ ] I have followed Sample Guidelines from AUTHORING_GUIDE.MD
• [ ] README is updated to include all relevant information
• [ ] Tests pass: nox -s py-3.9 (see Test Environment Setup)
• [ ] Lint pass: nox -s lint (see Test Environment Setup)
• [ ] These samples need a new API enabled in testing projects to pass (let us know which ones)
• [ ] These samples need a new/updated env vars in testing projects set to pass (let us know which ones)
• [x] This sample adds a new sample directory, and I updated the CODEOWNERS file with the codeowners for this sample
• [ ] This sample adds a new Product API, and I updated the Blunderbuss issue/PR auto-assigner with the codeowners for this sample
• [x] Please merge this PR for me once it is approved

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[adityasri03]

done

[jinglundong]

It appears that some CI tests are failing. I suspect that we need to make more changes to upgrade the code sample from python27 to python312. Could you take a look at the failing tests? Thanks!

[davidcavazos]

Tests are passing, but we need the CLA signed to merge this.

[glasnt]

This is an older PR that hasn't had a CLA signed in 6 months, closing.