Update Codecov ghaction

[Stoops-ML]

New test

[codecov[bot]]

Codecov Report

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

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #130 +/- ## ======================================= Coverage ? 48.53% ======================================= Files ? 11 Lines ? 1125 Branches ? 0 ======================================= Hits ? 546 Misses ? 579 Partials ? 0 ``` | [Flag](https://app.codecov.io/gh/poliastro/czml3/pull/130/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=poliastro) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/poliastro/czml3/pull/130/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=poliastro) | `48.53% <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=poliastro#carryforward-flags-in-the-pull-request-comment) to find out more.

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