await: fix dead homepage url (#404975)

  versionCheckProgramArg = "--version";

  meta = with lib; {

    changelog = "https://github.com/slavaGanzin/await/releases/tag/${version}";

    description = "Small binary that runs a list of commands in parallel and awaits termination";

    homepage = "https://await-cli.app";

    homepage = "https://github.com/slavaGanzin/await";

    license = licenses.mit;

    maintainers = with maintainers; [ chewblacka ];

    platforms = platforms.all;