Fix broken example in README

After commit 9bb558386dc295e23f2043d7f2c36571db0ca982, the name our jars
now contains the version number 1.0.0 instead of 1.0. The default command
line was changed accordingly (in build.mk), but we forgot to likewise
update the example in the README. This trivial patch fixes the example.

Signed-off-by: Nadav Har'El <nyh@cloudius-systems.com>