Add link to 2023 IRA-related policy

[MaxGhenis]

Pending #969

Unnecessary if we implement https://github.com/PolicyEngine/policyengine/issues/851

[MaxGhenis]

Actually this might not be entirely possible since the IRA involves changing list parameters, e.g. https://github.com/PolicyEngine/openfisca-us/blob/master/openfisca_us/parameters/gov/irs/credits/residential_clean_energy/elements.yaml

@nikhilwoodruff is there a way for us to capture this without the snapshot date picker?

[MaxGhenis]

Yeah actually the list parameters are central, e.g. this rebate program will always be zero without it: https://github.com/PolicyEngine/openfisca-us/blob/master/openfisca_us/parameters/gov/doe/high_efficiency_electric_home_rebate/elements.yaml

So I think we should just focus on the date picker. Closing.