add toc: in sample.yml
add toc: in sample.yml

masawada/review,kmuto/review,orangain/review,takahashim/review,orangain/review,masawada/review,krororo/review,kmuto/review,murashitas/review,kuad9/review_study,kuad9/review_study,murashitas/review,takahashim/review,suzuki/review,krororo/review,suzuki/review,krororo/review,kmuto/review