Allow CI failure for stable authentik version

[BeryJu]

This provider is usually targeting the next version of authentik, so CI is allowed to fail on the current version

[codecov[bot]]

Codecov Report

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

Comparison is base (33e3f81) 84.30% compared to head (b10da0e) 84.30%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #441 +/- ## ======================================= Coverage 84.30% 84.30% ======================================= Files 75 75 Lines 8387 8387 ======================================= Hits 7071 7071 Misses 914 914 Partials 402 402 ```

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