Bump Python to 3.11

[andreyvelich]

That should fix our post-commit publishing error.

cc @kubeflow/kubeflow-steering-committee @varodrig @rimolive @thesuperzapper

[google-oss-prow]

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[andreyvelich]

Never mind, this fix doesn't affect publishing.
As I can see the new Blog Post has been released: https://blog.kubeflow.org/gsoc-2024-project-4/
cc @helenxie-bit

[thesuperzapper]

Always use quotes around strings like this, as yaml interprets it as a number, so 3.10 would actually be 3.1.

[thesuperzapper]

@andreyvelich for reference, the blog is hosted on GitHub pages, even though the previews are done with netlify