[ch-quantum-hardware] OR -> XOR

[ronf6co]

Describe the issue

In the file of error-correction-repetition-code "It is therefore the bitwise OR of the syndrome..." It seems that OR is not correct

Describe what you expect to see

I think that you were meaning XOR Since if the syndrome is not changing, XOR between current and one before will be 0000 in case of no change. and not OR