fix(suggestion) use -fail-level=none for suggestion pass to avoid exit 1

Author: anatox

script.sh

@@ -117,8 +117,7 @@ shellcheck -f diff ${FILES} \
       -f.diff.strip=1 \
       -reporter="github-pr-review" \
       -filter-mode="${INPUT_FILTER_MODE}" \
-      -fail-level="${INPUT_FAIL_LEVEL}" \
-      -fail-on-error="${INPUT_FAIL_ON_ERROR}" \
+      -fail-level=none \
       ${INPUT_REVIEWDOG_FLAGS}
 EXIT_CODE_SUGGESTION=$?
 echo '::endgroup::'