Fix copr package name

trigger_copr

     CoprProject=$1
     test -n "$CoprProject" || usage
     which copr >/dev/null \
-     || die "copr not found, try 'sudo install python-copr'"
+     || die "copr not found, try 'sudo install copr-cli'"
     if test -n "$Branch"; then
         die "not implemented"
         test -n "$Version" || Version=$(git_guess ver)