I submitted the announcement email because it links to release notes from all the projects (i.e. Clang, LLD, Flang, etc.) and not just the main LLVM ones.
(Also it seems the version number changed from 11.0.0 to 11.0?)
That makes sense, but lists of links don't make good HN submissions, since there isn't much to discuss beyond the lowest common denominator of the items on the list. It's best to pick the most interesting element from the list and submit that—especially since HN is itself a list of links already. https://hn.algolia.com/?dateRange=all&page=0&prefix=true&sor...
(yes, we always do that with x.0.0 version numbers)