fix typo in Documentation/SubmittingPatches

This adds a missing letter in Documentation/SubmittingPatches.

Signed-off-by: Nik Nyby <nikolas@gnu.org>
Signed-off-by: Jiri Kosina <jkosina@suse.com>

Documentation/SubmittingPatches

@@ -291,7 +291,7 @@ sending him e-mail.
 
 If you have a patch that fixes an exploitable security bug, send that patch
 to security@kernel.org.  For severe bugs, a short embargo may be considered
-to allow distrbutors to get the patch out to users; in such cases,
+to allow distributors to get the patch out to users; in such cases,
 obviously, the patch should not be sent to any public lists.
 
 Patches that fix a severe bug in a released kernel should be directed