Merge pull request #191813 from felipeqq2/master

aria2: add main program

pkgs/tools/networking/aria2/default.nix

···
   meta = with lib; {
     homepage = "https://aria2.github.io";
     description = "A lightweight, multi-protocol, multi-source, command-line download utility";
+    mainProgram = "aria2c";
     license = licenses.gpl2Plus;
     platforms = platforms.unix;
     maintainers = with maintainers; [ Br1ght0ne koral ];