I don't think the 2022.1 version is available yet
(normally I just change the portion of url version# even if they haven't officially said is available sometimes will work)
however, here are the release notes:
https://newgennow.com/wp-content/uploads/2022/01/ReleaseNotes_2022.1.0.pdf
doesn't look like Inventory Adjustments have been added yet to GA, referencing section "Fully Supported Record Types for REST Web Services in 2022.1"