configs/stm32f429_disco_xip: bump Linux to 6.1.155

The patch bumps the Linux kernel to version 6.1.155. The size of
xipImage has increased by only 1126 bytes (1673444 bytes compared to
1672318 in version 6.1.143).

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>