error message update for pointers in form

[firodj]

Just sugestion to help developers to update panic error message, to add also form.

huma/huma.go

Line 160 in 689a87d

panic("pointers are not supported for path/query/header parameters")

Thanks

[wolveix]

Hey @firodj! Thanks for the suggestion :) I've just merged a PR that makes this error message clearer.