chore: nightly SDK version bump

[github-actions]

This PR updates Python kernel and TypeScript @onkernel/sdk version constraints to the latest published releases.

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TL;DR

Bumped Python kernel SDK version to 0.8.1 in all Python templates.

Why we made these changes

To keep our Python templates up-to-date with the latest kernel SDK features, bug fixes, and improvements.

What changed?

• templates/python/advanced-sample/pyproject.toml: Updated kernel from 0.8.0 to 0.8.1.
• templates/python/browser-use/pyproject.toml: Updated kernel from >=0.8.0 to >=0.8.1.
• templates/python/computer-use/pyproject.toml: Updated kernel from >=0.8.0 to >=0.8.1.
• templates/python/cua/pyproject.toml: Updated kernel from >=0.8.0 to >=0.8.1.
• templates/python/sample-app/pyproject.toml: Updated kernel from 0.8.0 to 0.8.1.

Validation

• Automated CI checks passed, ensuring projects build and run with the new dependency.
  

[mesa-dot-dev]

What Changed

This PR performs a routine version bump for the Python kernel SDK from 0.8.0 to 0.8.1 across all Python project templates. This ensures that new projects created from our templates will utilize the latest SDK version.

Risks / Concerns

This is a straightforward and low-risk dependency bump. The changes are consistent and align with standard maintenance practices. Great job keeping our dependencies up to date!

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