Add clarification for readme regarding Espruino
Add clarification for readme regarding Espruino

Add clarification for Espruino as I tried using Espruino on my v1.5 micro:bit but Espruino doesn't work with the LSM303AGR on the v1.5 micro:bit due to different I2C addresses. @gfwilliams hasn't fixed this due to low interest from the entire micro:bit community - I'll try and make a PR for the micro:bit Educational Foundation's website if it's hosted on GitHub. Thanks!
carlosperate/awesome-microbit,carlosperate/awesome-microbit