Bump nebari version and upgrade step to 2025.2.1

[viniciusdc]

Reference Issues or PRs

What does this implement/fix?

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds a feature)
• Breaking change (fix or feature that would cause existing features not to work as expected)
• Documentation Update
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Build related changes
• Other (please describe):

Testing

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Any other comments?

[marcelovilla]

@viniciusdc if we keep the * instead of - for the markdown bullet points, it will break our docs. Can you change those?

[viniciusdc]

Thanks, @marcelovilla. I completely forgot that was the main cause of the issue.

[marcelovilla]

Thanks @viniciusdc !