fix(ci): update submodule script

tools/ci-scripts/trigger-build.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+pushd "$TRAVIS_BUILD_DIR"
+
+if [ -n "$DOCKER_PUSH_API_TOKEN" ]
+then
+  git clone https://github.com/"$DOCKER_PUSH_REPO".git docker-push-repo
+
+  cd docker-push-repo/freecodecamp
+  git submodule update --init --remote --recursive
+  git submodule status
+  cd ../
+  git add freecodecamp
+  git -c user.name="$DOCKER_PUSH_USER" -c user.email='travis' \
+    commit -m 'chore(ci): Travis CI - bump submodule'
+  git push https://"$DOCKER_PUSH_USER":"$DOCKER_PUSH_API_TOKEN"@github.com/"$DOCKER_PUSH_REPO".git master
+fi
+popd