correct type in hb sync script (#34)

Author: bwagner5

scripts/sync-to-aws-homebrew-tap

@@ -194,7 +194,7 @@ if [[ "${DRY_RUN}" -eq 0 ]]; then
 
   cp "${BREW_CONFIG_DIR}/${BINARY_BASE}.json" "${FORK_DIR}/bottle-configs/${BINARY_BASE}.json"
 
-  FORK_RELEASE_BRANCH="${BINARY_BASE}-${VERSION}-${BUILD_DIR}"
+  FORK_RELEASE_BRANCH="${BINARY_BASE}-${VERSION}-${BUILD_ID}"
 
   git config user.name "ec2-bot 🤖"
   git config user.email "[email protected]"