Merge pull request #258059 from Nilstrieb/mold-mainprogram

pkgs/development/tools/mold/default.nix

···
     changelog = "https://github.com/rui314/mold/releases/tag/v${version}";
     license = licenses.mit;
     maintainers = with maintainers; [ azahi nitsky paveloom ];
+    mainProgram = "mold";
     platforms = platforms.unix;
   };
 }