docs: filesystems: Fix a mundane typo

s/provisoned/provisioned/

Signed-off-by: Bhaskar Chowdhury <unixbhaskar@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Link: https://lore.kernel.org/r/20210319015848.19515-1-unixbhaskar@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/filesystems/vfat.rst

@@ -189,7 +189,7 @@ VFAT MOUNT OPTIONS
 **discard**
 	If set, issues discard/TRIM commands to the block
 	device when blocks are freed. This is useful for SSD devices
-	and sparse/thinly-provisoned LUNs.
+	and sparse/thinly-provisioned LUNs.
 
 **nfs=stale_rw|nostale_ro**
 	Enable this only if you want to export the FAT filesystem