config.sh: Fix typo and use correct vars for setting up GRUB Hidden Menu

The conditional was getting skipped due to a missing whitespace and
the editenv command was never getting run. Additionally, we should
be using the boot_indeterminate flag for first boot instead of boot_success.

config.sh

@@ -42,9 +42,9 @@ if [[ "$kiwi_profiles" != *"Container"* ]] && [[ "$kiwi_profiles" != *"FEX"* ]]
 	## Disable recovery entries to match Fedora
 	echo "GRUB_DISABLE_RECOVERY=true" >> /etc/default/grub
 	## Write `menu_auto_hide=1` into grubenv to match Fedora anaconda installs
-	## Set boot_success to avoid displaying the grub menu on first boot
+	## Set boot_indeterminate to avoid displaying the grub menu on first boot
 	if [[ "$kiwi_profiles" != *"Server"* ]]; then
-		grub2-editenv /boot/grub2/grubenv set menu_auto_hide=1 boot_success=1
+		grub2-editenv /boot/grub2/grubenv set menu_auto_hide=1 boot_indeterminate=1
 	fi
 fi