Include solidus_legacy_promotions in release task

[mamhoff]

Not sure how we missed that when including solidus_promotions.

[codecov[bot]]

Codecov Report

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

Project coverage is 89.54%. Comparing base (825fb6d) to head (6c8e842). Report is 2 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #5941 +/- ## ======================================= Coverage 89.54% 89.54% ======================================= Files 782 782 Lines 17991 17991 ======================================= Hits 16110 16110 Misses 1881 1881 ```

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[github-actions[bot]]

💚 All backports created successfully

Status	Branch	Result
✅	v4.4

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Please refer to the Backport tool documentation and see the Github Action logs for details