Make sure to include kali-linux-firmare

As it's now installed in all cases by tasksel, so we must make sure it's
there. This should fix:

- https://gitlab.com/kalilinux/kali-purple/documentation/-/issues/8
- https://gitlab.com/kalilinux/kali-purple/documentation/-/issues/11

kali-config/common/package-lists/hardware-support.list.chroot

@@ -1,3 +1,8 @@
+##
+## Add kali-linux-firmware, which depends on the most common firmware
+##
+kali-linux-firmware
+
 ##
 ## Add extra firmware (kali-linux-headless depends on firmware we wants, but
 ## some can't be put there because they require network access... but we