Correct usage instructions for baremetal script
diff --git a/scripts/baremetal.sh b/scripts/baremetal.sh
index 466441f..346937b 100755
--- a/scripts/baremetal.sh
+++ b/scripts/baremetal.sh
@@ -266,7 +266,7 @@
 }
 
 show_usage() {
-    echo "Usage: $0 [--rom [--gcc|--armc5|--armc6]|--ram]"
+    echo "Usage: $0 [--rom [--gcc] [--armc5] [--armc6]|--ram [--stack] [--heap]]"
 }
 
 test_build=0