@rey anyway, here's the template:

to: legal@23andme.com, customercare@23andme.com, arbitrationoptout@23andme.com, [my secondary email address]
subject: TOS opt-out

My name is [name from my 23andMe profile] and my email address is [email address from my 23andMe profile]. I am writing in response to 23andMe's November 30, 2023 update to 23andMe's Terms of Service; I am writing to notify 23andMe that I do not agree to the terms.