[GitHub Actions] iOS Pipeline should `cd` into ios project first to avoid conflicts

[create-issue-branch[bot]]

closes #197

[codecov[bot]]

Codecov Report

Patch and project coverage have no change.

Comparison is base (fe89756) 97.72% compared to head (841a6d7) 97.72%. Report is 8 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #198 +/- ## ======================================= Coverage 97.72% 97.72% ======================================= Files 13 13 Lines 44 44 ======================================= Hits 43 43 Misses 1 1 ```

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[SakulFlee]

This will be done in #202