Change targets in dummy virtual z corrections

[Edoardo-Pedicillo]

Checklist:

• [ ] Reviewers confirm new code works as expected.
• [ ] Tests are passing.
• [ ] Coverage does not decrease.
• [ ] Documentation is updated.

[codecov[bot]]

Codecov Report

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

Project coverage is 69.89%. Comparing base (171522a) to head (923fe93). Report is 2 commits behind head on 0.1.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## 0.1 #1085 +/- ## ======================================= Coverage 69.89% 69.89% ======================================= Files 64 64 Lines 6876 6876 ======================================= Hits 4806 4806 Misses 2070 2070 ``` | [Flag](https://app.codecov.io/gh/qiboteam/qibolab/pull/1085/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=qiboteam) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/qiboteam/qibolab/pull/1085/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=qiboteam) | `69.89% <ø> (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=qiboteam#carryforward-flags-in-the-pull-request-comment) to find out more.

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.