fix(ndt_scan_matcher): modify diagnostic (#7112)

* Fixed diagnostic

Signed-off-by: Shintaro Sakoda <shintaro.sakoda@tier4.jp>

* Fixed README.md

Signed-off-by: Shintaro Sakoda <shintaro.sakoda@tier4.jp>

* style(pre-commit): autofix

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Signed-off-by: Shintaro Sakoda <shintaro.sakoda@tier4.jp>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: SakodaShintaro