🧑‍💻 PIO --silent in build_example

buildroot/bin/build_example

 
 echo "Building the firmware now..."
 HERE=`dirname "$0"`
-$HERE/mftest -a -n1 || { echo "Failed"; exit 1; }
+$HERE/mftest -s -a -n1 || { echo "Failed"; exit 1; }
 
 echo "Success"