Update the README to align with TF-M v1.5.0 in TF-M integration (#469)
Update the README to align with TF-M v1.5.0 in TF-M integration (#469)

Signed-off-by: Xinyu Zhang <6cc6d6aecac01d7f967a62abc7a93001c2197183@arm.com>
Change-Id: Ic04b82259ac17d5e0f8662118385c803e68af3e5
FreeRTOS/FreeRTOS-Kernel,FreeRTOS/FreeRTOS-Kernel