Container Hash is listed twice in libraries overview on boost.org

[saimen]

When checking the list of boost libraries on boost.org,
the "Container Hash" library is listed twice. The issue started with Boost 1.78. I tried to figure out what's causing this but can only state a wild guess: The libraries.json contains information in the std and cxxstd keys. I have no clue if this leads to the double listing, but it definitely looks wrong.