update sso guide to local profile to use a profile other than default

**Describe the content issue**:
A clear and concise description of what the content issue is. Is there content missing or is there incorrect content?

currently the guide provides the following information,
`Make sure to set the profile name to default. Alternatively, remember the auto-generated profile name; you will need this later.`

which can cause issue if they already have a default profile configured previously. Issue: https://github.com/aws-amplify/amplify-backend/issues/1954

updating to guide to use a profile other than default would be helpful and also mitigate issues from folks coming from Gen 1

**URL page where content issue is**:
https://docs.amplify.aws/react/start/account-setup/#4-set-up-local-aws-profile