"New advice on site dashboard" notification but no advice there! (3.6.0.beta3-latest)

I have a feeling it’s trying to tell me to rebuild Discourse. I last did that on 29 October 2025, to 3.6.0.beta3-latest. Is it something to do with the new version naming conventions? Should I rebuild despite it saying “Looks like you updated recently. Fantastic!”?

Thanks.