Use CODECOV_TOKEN

[mwouts]

This will hopefully fix the codecov upload errors

[github-actions[bot]]

Thank you for making this pull request.

Did you know? You can try it on Binder: or .

Also, the version of Jupytext developed in this PR can be installed with pip:

pip install git+https://github.com/mwouts/jupytext.git@use_codecov_token

(this requires nodejs, see more at Developing Jupytext)

[codecov[bot]]

Codecov Report

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

Project coverage is 97.73%. Comparing base (12644e1) to head (2519484). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1228 +/- ## ========================================== - Coverage 97.75% 97.73% -0.03% ========================================== Files 29 29 Lines 4463 4463 ========================================== - Hits 4363 4362 -1 - Misses 100 101 +1 ``` | [Flag](https://app.codecov.io/gh/mwouts/jupytext/pull/1228/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Marc+Wouts) | Coverage Δ | | |---|---|---| | [external](https://app.codecov.io/gh/mwouts/jupytext/pull/1228/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Marc+Wouts) | `75.02% <ø> (-0.12%)` | :arrow_down: | | [functional](https://app.codecov.io/gh/mwouts/jupytext/pull/1228/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Marc+Wouts) | `88.48% <ø> (ø)` | | | [integration](https://app.codecov.io/gh/mwouts/jupytext/pull/1228/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Marc+Wouts) | `?` | | | [unit](https://app.codecov.io/gh/mwouts/jupytext/pull/1228/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Marc+Wouts) | `66.55% <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=Marc+Wouts#carryforward-flags-in-the-pull-request-comment) to find out more.

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