operating-systems: buer: Reduce grub timeout to 1 second

buer.scm

@@ -8,7 +8,7 @@
            (radix packages text-editors)
            (radix packages shells)
            (radix services admin)
-           (radix services linux)
+           (radix services pm)
            (radix system setuid)
            (radix secrets)
            (radix utils)
@@ -49,6 +49,7 @@
   (bootloader-configuration
    (bootloader grub-bootloader)
    (targets `("/dev/sda"))
+   (timeout 1)
    (theme (grub-theme
            (image (file-append %artwork-repository
                                "/backgrounds/guix-silver-16-9.svg"))