You’ll need to use Result_3 in the last command:
didc decode -t "(Result_3)" -d governance.did $RESULT
(The instructions were written for an earlier version of the canister which used Result_2 here).
Alternatively you could also call that method via the candid interface for the canister here, just look for get_neuron_info and enter your neuron id: DFINITY Canister Candid UI
This interface won’t be useable for all the methods on the canister you may want to call, but for get_neuron_info it’ll work fine.