Upgrade qutip to drop the restriction on scipy

[HGSilveri]

In #540, we restricted the SciPy version to be <1.11 because it was breaking Qutip. Now that Qutip 4.7.2 was released with a fix for this, we can relax that restriction by enforcing that qutip ~= 4.7.2.

[a-corni]

Why should it be qutip ~= 4.7.2 and not qutip >= 4.7.2 ? Because everything works with version 4 ?

[HGSilveri]

Well, only because I'm kind of tired of qutip dependencies always conflicting with other packages, this way it is more controlled (since qutip ~= 4.7.2 is equivalent to qutip >= 4.7.2, <4. 8)

[a-corni]

Great ! I was just wondering haha