Fix typo in bootstrap

scripts/setup/bootstrap.sh

@@ -207,7 +207,7 @@ if _submodules_need_updating; then
  echo "For a clean checkout, consider running:"
  echo " ./scripts/checkout_submodules.py --shallow --platform <your-platform>"
  echo "OR for a full checkout:"
- echo " git submodules update -f --init --recursive"
+ echo " git submodule update -f --init --recursive"
 
  # reset output
  if which tput >/dev/null; then tput sgr0; fi