Fix hpars

[Edoardo-Pedicillo]

Solves #586

Checklist:

• Reviewers confirm new code works as expected.
• Tests are passing.
• Coverage does not decrease.
• Documentation is updated.
• Compatibility with Qibo modules (Please edit this section if the current pull request is not compatible with the following branches).
  • Qibo: master
  • Qibolab: main
  • Qibolab_platforms_qrc: main

[codecov]

Codecov Report

Merging #588 (aaf4360) into main (7893a8c) will increase coverage by 0.04%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #588      +/-   ##
==========================================
+ Coverage   96.05%   96.10%   +0.04%     
==========================================
  Files          92       92              
  Lines        6164     6156       -8     
==========================================
- Hits         5921     5916       -5     
+ Misses        243      240       -3     

Flag	Coverage Δ
unittests	96.10% <100.00%> (+0.04%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
src/qibocal/fitting/classifier/run.py	97.47% <100.00%> (+0.78%)	⬆️
...bocal/protocols/characterization/classification.py	100.00% <100.00%> (+0.53%)	⬆️
...rotocols/characterization/qutrit_classification.py	97.53% <ø> (-0.06%)	⬇️
src/qibocal/protocols/characterization/utils.py	97.23% <100.00%> (ø)

... and 2 files with indirect coverage changes