libdl.so should be libdl.so.2 for linux Ubuntu 2022

[tmidcaint]

assimp-net/AssimpNet/Unmanaged/AssimpLibrary.cs

Line 1765 in c32aa53

[DllImport("libdl.so")]

I believe this should be libdl.so.2 for newer versions of Ubuntu. (and possibly other distros) since it is not consistently named. See here: (mellinoe/nativelibraryloader#2)