Fix linting syntax error

[freemansw1]

Well, #465 fixed most of our CI, but I inadvertently broke the linting YAML. This should fix it, hopefully.

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[codecov[bot]]

Codecov Report

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

Project coverage is 60.67%. Comparing base (706b3ee) to head (ddf7f96).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #466 +/- ## ======================================= Coverage 60.67% 60.67% ======================================= Files 23 23 Lines 3537 3537 ======================================= Hits 2146 2146 Misses 1391 1391 ``` | [Flag](https://app.codecov.io/gh/tobac-project/tobac/pull/466/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=tobac-project) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/tobac-project/tobac/pull/466/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=tobac-project) | `60.67% <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=tobac-project#carryforward-flags-in-the-pull-request-comment) to find out more.

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