All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.
Whoever reads “I vow to fast for one day”, he is not obliged to observe a vow, because the matter was that he merely read a written statement without intending to fast or intending a vow.
In addition to this, the expression that is mentioned does not indicate a vow.
Allah knows best.