fix msr in avoided crossing

[Edoardo-Pedicillo]

Quick fix
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 #623 (12f492e) into main (27f92f3) will increase coverage by 0.06%.
Report is 29 commits behind head on main.
The diff coverage is 99.28%.

@@            Coverage Diff             @@
##             main     #623      +/-   ##
==========================================
+ Coverage   95.90%   95.96%   +0.06%     
==========================================
  Files         102      103       +1     
  Lines        7101     7238     +137     
==========================================
+ Hits         6810     6946     +136     
- Misses        291      292       +1     

Flag	Coverage Δ
unittests	95.96% <99.28%> (+0.06%)	⬆️

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Files	Coverage Δ
src/qibocal/auto/operation.py	100.00% <100.00%> (ø)
src/qibocal/protocols/characterization/__init__.py	100.00% <100.00%> (ø)
...racterization/two_qubit_interaction/cz_virtualz.py	96.24% <100.00%> (ø)
...aracterization/flux_dependence/avoided_crossing.py	99.25% <99.25%> (ø)