iCloud storage is full
I received an email that my iCloud storage is full and asking me to update to iCloud+ with 50GB for $0.99 per month. the email is addressed to my Apple id account email. I confirmed that the email is not a phishing email and came from Apple. I'm already paying for 200GB per month storage which I confirmed looking at my Apple id storage on my phone, which is the same that the I got emails regarding the iCloud almost being full. I'm unclear what needs to be done.
iPhone 12