Fix denoising

[tsalo]

Closes #45.

Changes proposed:

• Enabled confound standardization in the denoising step.

[codecov[bot]]

Codecov Report

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

Project coverage is 31.55%. Comparing base (9594677) to head (933e3e4). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #51 +/- ## ======================================= Coverage 31.55% 31.55% ======================================= Files 26 26 Lines 2266 2266 Branches 359 359 ======================================= Hits 715 715 Misses 1530 1530 Partials 21 21 ```

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