fix: state frame conversion in ComputeTargetDirectionVector

[codecov[bot]]

Codecov Report

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

Project coverage is 90.85%. Comparing base (19b96f5) to head (ed6531c). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #438 +/- ## ======================================= Coverage 90.85% 90.85% ======================================= Files 84 84 Lines 8547 8547 ======================================= Hits 7765 7765 Misses 782 782 ``` | [Flag](https://app.codecov.io/gh/open-space-collective/open-space-toolkit-astrodynamics/pull/438/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=open-space-collective) | Coverage Δ | | |---|---|---| | [](https://app.codecov.io/gh/open-space-collective/open-space-toolkit-astrodynamics/pull/438/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=open-space-collective) | `90.85% <100.00%> (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=open-space-collective#carryforward-flags-in-the-pull-request-comment) to find out more.

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