docs: process: typo fix

In the second paragraph of section "Respond to review comments", there is
a spelling mistake: "aganst" should be "against".
Signed-off-by: Xujun Leng <lengxujun2007@126.com>
Link: https://lore.kernel.org/r/20230312071423.3042-1-lengxujun2007@126.comSigned-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/process/submitting-patches.rst

@@ -320,7 +320,7 @@ for their time.  Code review is a tiring and time-consuming process, and
 reviewers sometimes get grumpy.  Even in that case, though, respond
 politely and address the problems they have pointed out.  When sending a next
 version, add a ``patch changelog`` to the cover letter or to individual patches
-explaining difference aganst previous submission (see
+explaining difference against previous submission (see
 :ref:`the_canonical_patch_format`).
 
 See Documentation/process/email-clients.rst for recommendations on email