How to update profile picture in Sanity account settings?

I checked the available Sanity documentation but couldn't find official information about how profile pictures are managed on manage.sanity.io/account. This account management feature isn't covered in the developer-focused documentation I have access to.

Here's what I'd recommend:

1. Check the account page directly - Visit manage.sanity.io/account and look for any edit or upload options near your profile picture. Some platforms have subtle UI elements for changing avatars that aren't always documented.

2. Contact Sanity support - Reach out through sanity.io/contact/support for the official method. They'll be able to tell you whether profile pictures are managed through a third-party service (like Gravatar), directly through the account page, or through your authentication provider (GitHub, Google, etc.).

3. Ask in the community - Post on community.sanity.io where Sanity team members and other users can share their experience with this specific account management feature.

I apologize I can't provide more specific instructions without being able to verify the exact mechanism Sanity uses for profile pictures. Account management features like this are sometimes handled differently than the content and development features that are thoroughly documented, so the support team will be your best resource for accurate information.