Correct mis-named variable

bin/on-local-blogs

@@ -16,4 +16,4 @@ dir=${dir:-.}
 abs_dir=$(cd ${dir} && pwd)
 
 ${dir}/noblogs print-local-blogs | grep -v Warning \
-    | xargs -n ${CONCURRENCY:-30} ${abs_dir}/noblogs "$@"
+    | xargs -n ${BATCH_SIZE:-30} ${abs_dir}/noblogs "$@"