Fix nightly build

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>

workflows/autobuild.sh

@@ -9,7 +9,7 @@ git submodule update --init
 cd ..
 git clone https://github.com/raspberrypi/picotool
 cd picotool
-git submodule update --init lib/mbedtls
+git submodule update --init
 mkdir build
 cd build
 cmake ..