Use FAT32 for all UFD partitions

This breaks macOS images but those are deprecated at this point.

scripts/wk/kit/ufd.py

@@ -350,7 +350,7 @@ def create_table(dev_path, use_mbr=False, images=None) -> None:
   for part, real in zip(part_sizes, images):
     end = start + real
     cmd.append(
-      f'mkpart primary {"fat32" if start==MIB else "hfs+"} {start}B {end-1}B',
+      f'mkpart primary "fat32" {start}B {end-1}B',
       )
     start += part