Properly install Bundler man pages
With Ruby 3.0.1, the Bundler man pages moved from
man directory to
lib/bundler/man directory. While I appreciate, that hopefully (I have not tested it yet) Ruby installed Bundler will be able to properly display
bundle help, this OTOH results in Bundler man pages not being correctly installed into system wide locations. This is unexpected in teeny release. While I can fix this in Fedora, I'd appreciate, if
make install installed the Bundler man pages into proper locations.