changed backend to reflect proposed architecture

[vabite]

4.1.3 Solving combinatorial optimization problems using QAOA

Changes made

Changed backend to Yorktown and updated the optimization results accordingly

Justification

Santiago does not seem to have a 'butterfly' architecture (qubits connectivity) as stated in the tutorial

[divshacker]

Hey @vabite I don't see any real devices used in 4.1.3 Solving combinatorial optimization problems using QAOA May I know what changes made? Thanks

[frankharkins]

I'm going to close this as it no longer seems to apply