Spurious diffs in user attributes

[Liz Fong-Jones]

I'm seeing a "missing" type parameter inside of the user attribute schema...

      ~ custom_schema {
            name  = "AWS"
          ~ value = jsonencode(
              ~ {
                  ~ role            = [
                      ~ {
                          - type  = "work" -> null
                            value = "arn:aws:iam::123456789:role/platform,arn:aws:iam::123456789:saml-provider/google"
                        },
                    ]
                  + sessionDuration = 57600
                }
            )
        }
    }