FindBoost: Add support for Boost 1.82

Update the list of known versions.

There is a new header-only library, Boost.MySQL. It has no
dependencies and has a core header `<boost/mysql.hpp>`.

Run the command

    cmake -DBOOST_DIR=/path/to/boost_1_82_0 \
      -P Utilities/Scripts/BoostScanDeps.cmake

to extract dependencies from the 1.82.0 source tree.
They are the same as 1.81's dependencies, so just update
the version check for warning about newer versions.