No they didn't, you moron. This is what they said.
Based on what CDC knows now, existing tests used to detect and medications used to treat COVID-19 appear to be effective with this variant. BA.2.86 may be more capable of causing infection in people who have previously had COVID-19 or who have received COVID-19 vaccines.
They said nothing about the unvaxxed.
Then they said this.
CDC’s current assessment is that this updated vaccine will be effective at reducing severe disease and hospitalization. At this point, there is no evidence that this variant is causing more severe illness.
That's from your link, you low-IQ dumbass rube.