Update I2C pins via suggestoin from @CDarius

Co-authored-by: CDarius <[email protected]>

Author: jamesjnadeau

ports/espressif/boards/m5stack_cardputer/pins.c

@@ -65,7 +65,7 @@ STATIC const mp_rom_map_elem_t board_module_globals_table[] = {
 
     // Other
     { MP_ROM_QSTR(MP_QSTR_I2C), MP_ROM_PTR(&board_i2c_obj) },
-    { MP_ROM_QSTR(MP_QSTR_STEMMA_I2C), MP_ROM_PTR(&board_i2c_obj) },
+    { MP_ROM_QSTR(MP_QSTR_PORTA_I2C), MP_ROM_PTR(&board_i2c_obj) },
     { MP_ROM_QSTR(MP_QSTR_SPI), MP_ROM_PTR(&board_spi_obj) },
     { MP_ROM_QSTR(MP_QSTR_UART), MP_ROM_PTR(&board_uart_obj) },