What's wrong with this entry?
Marketplace sources of type strictKnownMarketplaces can now use pathPattern — a regex matched against .path of file and directory sources — to allow filesystem-based marketplaces alongside network source restrictions.
Path pattern restrictions (search for "pathPattern", "Regex pattern matched against the .path field")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
Related
Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.