[clang-tidy][NFC] Fix `linuxkernel-must-check-errs` documentation file name (#88655)

The check was originally introduced in commit
fc8c65b2e11d21b1c0ce070cc0a4ee031a542dae with conflicting names, likely as a
result of a partial rename, with the name in the documentation
(`linuxkernel-must-use-errs`) not matching the name of the check as configured
by users.

GitOrigin-RevId: a2691959cd23de9505243e9396897a3415606689
4 files changed