[CI] Allow failure on julia nightly

[codecov[bot]]

Codecov Report

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

Project coverage is 92.96%. Comparing base (3eb59e1) to head (cdb10a3).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #250 +/- ## ======================================= Coverage 92.96% 92.96% ======================================= Files 25 25 Lines 2813 2813 ======================================= Hits 2615 2615 Misses 198 198 ```

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[github-actions[bot]]

:warning: Nightly Build Failure :warning:

The nightly build has failed, but don't worry! :smile: This is an allowed failure and does not impact the overall success status of the commit.

:eyes: For more details, check the workflow run logs.

:rocket: Keep up the great work, and let's make our next build even better!