Fix build-stemcell-automation-zip path

Signed-off-by: Brian Upton <[email protected]>

Author: aramprice

ci/tasks/zip-files/run.bash

@@ -8,6 +8,6 @@ OPENSSH_ZIP=open-ssh/OpenSSH-Win64.zip \
 BOSH_PSMODULES_ZIP=bosh-psmodules/bosh-psmodules.zip \
 AGENT_ZIP=bosh-agent/agent.zip \
 DEPS_JSON=deps-file/deps.json \
-"${STEMBUILD_DIR}/build-stemcell-automation-zip.sh"
+"${ROOT_DIR}/stembuild/bin/build-stemcell-automation-zip.sh"
 
 cp "${STEMBUILD_DIR}/assets/StemcellAutomation.zip" "zip-file/StemcellAutomation-$(date +"%s").zip"