We also started noticing these remarks on several build pipelines. Looking back to the past it seems to be a similar issue back with moving to Java 11: Older default java version used with Azure devops Hosted agent - #27 by Vossekop
My idea would be that this is fixed in the task internally (by trying to fetch the latest possible version) rather than everybody having to update their pipelines (which in our case are also quite a lot). 
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