They skipped 1.0.0.4. You can see posts on web where other manufacturers used that AGESA and some users experienced difficulties and reverted to an older UEFI/AGESA.
A beta of UEFI with AGESA 1.0.0.6 was released for C7H WiFi only, UEFI 1101 in
this link. Again like any beta or even "official" release, there is potential for bugs/changes that you may experience that you'd not like. So do bare that in mind before upgrading if you have C7H.