Fix return order in the docstring of two_qubit_matrix_to_diagonal_and_cz_operations

[pavoljuhas]

Thanks to @guillembrasco-sudo for finding this.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.63%. Comparing base (61a6993) to head (10537a0).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7947   +/-   ##
=======================================
  Coverage   99.63%   99.63%           
=======================================
  Files        1108     1108           
  Lines       99571    99571           
=======================================
  Hits        99205    99205           
  Misses        366      366           

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