[Readme] Not most popular at the moment

[martin-eden]

Readme states "Most popular of all Arduino libraries on [GitHub]" but that's not so at the current moment:

(Also hello Benoît, I like reading your code when I'm too frustrated from C. Glad that we have such iceberg of code quality in the sea of amateurish libraries!)

[bblanchon]

Hi @martin-eden,

Thank you very much for reporting this!
You are right: FastLED overpassed ArduinoJson as the most starred Arduino library on GitHub.

Thank you also for your comment on code quality; this is really encouraging.

Best regards,
Benoit