not getting fidelity for amplitude-estimation/cirq/ae_benchmark.py and monte-carlo/cirq/mc_benchmark.py

[GIRISHBELANI]

after executing the benchmark files ae_benchmark.py and mc_benchmark.py for cirq, the fidelity values are getting equals to 0.

Suggestion: add below line after calculation of correct_dist

#convert the keys of the correct_dist dictionary into strings
correct_dist = {str(key): value for key, value in correct_dist.items()}