manifest: Update nrf hw models to latest

* Update the HW models module to
90f4484cbaec986ed253b4fe9649aa75e632de15

Including the following:
* 90f4484 nrf_dppi & dppi_hack: Add support for NRF_DPPI_ENDPOINT_

Note: This update requires hal_nordic/nrfx release 3.2

Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>