restore python 3.12 support for papermill

[morokosi]

The papermill provider was previously excluded from releasing a version compatible with Python 3.12 due to version compatibility issues with the aiohttp dependency. However, papermill version 2.6.0, which includes a fix for this issue, has now been released. By raising the minimum version to 2.6.0, we can ensure compatibility with Python 3.12.

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[boring-cyborg]

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[boring-cyborg]

Awesome work, congrats on your first merged pull request! You are invited to check our Issue Tracker for additional contributions.

[potiuk]

Thanks!