try to fix submodule

firmware/lib/Arduino-FOC-drivers/src/encoders/sc60228/README.md

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+# SC60228 SimpleFOC driver
+
+Driver for the Semiment 12bit magnetic encoder IC SC60288. According to specs it should support 12 bit accuracy, 10 bit effective accuracy and up to 20kRPM.
+
+Link to [Datasheet](https://semiment.com/wp-content/uploads/2021/04/SC60228_EN-VA1.0.pdf)
+
+The encoder and this driver were tested with a small gimbal motor and MKR1000 (SAMD21 MCU).
+
+## Hardware setup
+
+Connect as per normal for your SPI bus. No special hardware setup is needed to use this driver.
+
+## Software setup
+
+Its actually easier to use than the standard SPI sensor class, because it is less generic:
+
+```c++
+#include "Arduino.h"
+#include "Wire.h"
+#include "SPI.h"
+#include "SimpleFOC.h"
+#include "SimpleFOCDrivers.h"
+#include "encoders/sc60228/MagneticSensorSC60228.h"
+
+#define SENSOR1_CS 5 // some digital pin that you're using as the nCS pin
+MagneticSensorSC60228 sensor1(SENSOR1_CS);
+
+
+void setup() {
+    sensor1.init();
+}
+```
+
+Set some SPI options:
+
+```c++
+SPISettings mySPISettings(1000000, SC60228_BITORDER, SPI_MODE0); // lower speed to 1Mhz
+MagneticSensorSC60228 sensor1(SENSOR1_CS, mySPISettings);
+```
+
+Use another SPI bus:
+
+```c++
+void setup() {
+    sensor1.init(SPI2);
+}
+```