docs: ioctl: fix typo

"pointres" should be "pointers".

Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/process/botching-up-ioctls.rst

@@ -46,7 +46,7 @@ will need to add a 32-bit compat layer:
    conversion or worse, fiddle the raw __u64 through your code since that
    diminishes the checking tools like sparse can provide. The macro
    u64_to_user_ptr can be used in the kernel to avoid warnings about integers
-   and pointres of different sizes.
+   and pointers of different sizes.
 
 
 Basics