Coccinelle: pm_runtime: Fix grammar in comment

s/does not use unnecessary/do not unnecessarily use/
Signed-off-by: Thorsten Blum <thorsten.blum@toblux.com>
Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>

scripts/coccinelle/api/pm_runtime.cocci

 // SPDX-License-Identifier: GPL-2.0-only
-/// Make sure pm_runtime_* calls does not use unnecessary IS_ERR_VALUE
+/// Make sure pm_runtime_* calls do not unnecessarily use IS_ERR_VALUE
 ///
 // Keywords: pm_runtime
 // Confidence: Medium