ci: use pypi trusted publishing

[gruebel]

This PR

@beeme1mr would be great, if you can add what I wrote in the comment of the linked issue, then this should be good to go 💪

Related Issues

Relates #231

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (4883ab4) 93.84% compared to head (a2617d6) 93.84%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #258 +/- ## ======================================= Coverage 93.84% 93.84% ======================================= Files 16 16 Lines 439 439 ======================================= Hits 412 412 Misses 27 27 ``` | [Flag](https://app.codecov.io/gh/open-feature/python-sdk/pull/258/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=open-feature) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/open-feature/python-sdk/pull/258/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=open-feature) | `93.84% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=open-feature#carryforward-flags-in-the-pull-request-comment) to find out more.

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[beeme1mr]

Done, thanks!