we should only look for boot on uefi systems

examples/guided.py

@@ -268,8 +268,8 @@ def perform_installation_steps():
 						partition.format()
 				else:
 					archinstall.log(f"Did not format {partition} because .safe_to_format() returned False or .allow_formatting was False.", level=archinstall.LOG_LEVELS.Debug)
-
-			fs.find_partition('/boot').format('vfat')
+			if hasUEFI():
+				fs.find_partition('/boot').format('vfat')# we don't have a boot partition in bios mode
 
 			if archinstall.arguments.get('!encryption-password', None):
 				# First encrypt and unlock, then format the desired partition inside the encrypted part.