resolves #1161 (#1322)

This corrects the mismatched `PICO_DEFAULT_I2C` bus number (favors the breadboard pins not the stemma connector).
diff --git a/src/boards/include/boards/adafruit_itsybitsy_rp2040.h b/src/boards/include/boards/adafruit_itsybitsy_rp2040.h
index f9d27e9..c56f079 100644
--- a/src/boards/include/boards/adafruit_itsybitsy_rp2040.h
+++ b/src/boards/include/boards/adafruit_itsybitsy_rp2040.h
@@ -48,7 +48,7 @@
 
 //------------- I2C -------------//
 #ifndef PICO_DEFAULT_I2C
-#define PICO_DEFAULT_I2C 0
+#define PICO_DEFAULT_I2C 1
 #endif
 
 #ifndef PICO_DEFAULT_I2C_SDA_PIN