Update vfs_fat_ramdisk.py.exp

Author: eightycc

tests/extmod/vfs_fat_ramdisk.py.exp

@@ -1,7 +1,7 @@
 True
 True
 label: LABEL TEST
-statvfs: (512, 512, 44, 44, 44, 0, 0, 0, 0, 255)
+statvfs: (512, 512, 40, 40, 40, 0, 0, 0, 0, 255)
 getcwd: /
 True
 [('foo_file.txt', 32768, 0, 6)]