Some values are hard-coded and/or inherited: https://github.com/openforcefield/openff-units/blob/7c09762faf265c35e48d0a50ad9f2c24368dae0f/openff/units/data/constants.txt Pint updated these values from CODATA 2018 to 2022 (landed in version 0.25.0): https://github.com/hgrecco/pint/pull/2049/files
Some values are hard-coded and/or inherited: https://github.com/openforcefield/openff-units/blob/7c09762faf265c35e48d0a50ad9f2c24368dae0f/openff/units/data/constants.txt
Pint updated these values from CODATA 2018 to 2022 (landed in version 0.25.0): https://github.com/hgrecco/pint/pull/2049/files