message: docker: update PX4 to stable tag (v1.9.2 now)
diff: @@ -30,5 +30,6 @@ RUN apt-get update && \
  && rm -rf /var/lib/apt/lists/{apt,dpkg,cache,log} /tmp/* /var/tmp/*
  RUN git clone https://github.com/PX4/Firmware.git ${FIRMWARE_DIR}
  +RUN git -C ${FIRMWARE_DIR} checkout stable
  RUN git -C ${FIRMWARE_DIR} submodule update --init --recursive
  RUN cd ${FIRMWARE_DIR} && DONT_RUN=1 make px4_sitl gazebo && DONT_RUN=1 make px4_sitl gazebo
  