fix I2C constants
@@ -51,9 +51,9 @@ Plasma Stick uses GP4 and GP5 for its I2C interface. You can use the constants i
```python
from pimoroni_i2c import PimoroniI2C
-from pimoroni import PINS_BREAKOUT_GARDEN
+from pimoroni import BREAKOUT_GARDEN_I2C_PINS
-i2c = PimoroniI2C(**PINS_BREAKOUT_GARDEN)
+i2c = PimoroniI2C(**BREAKOUT_GARDEN_I2C_PINS)
```
Alternatively, you can specify the pin numbers directly:
