update changelog and docs

hal/src/fsfw_hal/linux/spi/SpiComIF.h

@@ -65,8 +65,8 @@ class SpiComIF : public DeviceCommunicationIF, public SystemObject {
    * the line state, which can be an issue on mode switches because the clock line will
    * switch the state after the chip select is pulled low.
    *
-   * It is recommended to call this function after #setSpiSpeedAndMode if the SPI bus
-   * has multiple SPI devices with different speed and SPI modes attached.
+   * It is recommended to call this function after #setSpiSpeedAndMode and after locking the
+   * CS mutex if the SPI bus has multiple SPI devices with different speed and SPI modes attached.
    * @param spiFd
    */
   void updateLinePolarity(int spiFd);