hw/i386/acpi-build: Update document reference

Update the reference for QEMU's ACPI PCI hotplug device interface. Also,
use the possessive form in the comment.

Signed-off-by: Gustavo Romero <gustavo.romero@linaro.org>
Message-ID: <20250504215639.54860-9-gustavo.romero@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
1 file changed