README.md: Link to https://www.rokers.io/
README.md: Link to https://www.rokers.io/

Now that issue #23 has been solved

Signed-off-by: Gianpaolo Macario <f8885408b8c3d931b330bae3c3a28a3af912c463@gmail.com>
robotrokers/robotrokers.github.io,ludusrusso/robotrokers.github.io,robotrokers/robotrokers.github.io,ludusrusso/robotrokers.github.io,ludusrusso/robotrokers.github.io,robotrokers/robotrokers.github.io