Remove Python 3.8 from list of Programming Languages

[antonwolfy]

The PR removes Python 3.8 as a Programming Language from the meta data, because dpnp package for python 3.8 will no longer be provided.

• Have you provided a meaningful PR description?
• Have you added a test, reproducer or referred to issue with a reproducer?
• Have you tested your changes locally for CPU and GPU devices?
• Have you made sure that new changes do not introduce compiler warnings?
• Have you checked performance impact of proposed changes?
• If this PR is a work in progress, are you filing the PR as a draft?

[github-actions]

View rendered docs @ https://intelpython.github.io/dpnp/index.html

[vlad-perevezentsev]

I think it would be a good idea to add a check for python version requirement in setup.
@antonwolfy what do you think?

[antonwolfy]

I think it would be a good idea to add a check for python version requirement in setup. @antonwolfy what do you think?

Yes, we can think about that. But it's definitely out of the scope for that PR.

[vlad-perevezentsev]

Thank you @antonwolfy