docs: ABI: README: fix grammatical error

The Note describing how to write ABI documentation fields contained
a typo. "The fields should be use a simple notation" should be
"The fields should use a simple notation".

Signed-off-by: Seongjun Hong <hsj0512@snu.ac.kr>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260701125501.93170-1-hsj0512@snu.ac.kr>
This commit is contained in:
Seongjun Hong 2026-07-01 12:55:01 +00:00 • committed by Jonathan Corbet
commit bc7616fb71