Don't update index during the normal run

Since we did that at the start

install/firewall.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 
 if ! command -v ufw &>/dev/null; then
-  yay -Sy --noconfirm --needed ufw ufw-docker
+  yay -S --noconfirm --needed ufw ufw-docker
 
   # Allow nothing in, everything out
   sudo ufw default deny incoming