How will I reset my note lock in iCloud

If you created secure notes in the Notes app, and forgot the password, you will not be able to recover them. You can; however, create a new locked note. You also have an unlimited number of times to "guess" the password ... should you want to try.

If "reset note lock" stays for "reset a note password", see the section "If you forgot your notes password" in the following support article:--> How to lock notes on your iPhone, iPad, and iPod touch - Apple Support

If you mean something different, please specify your needs better.

Thanks and Regards

Giulio