crowdin_sync: Add support for JIRA ticket in commit msg

Change-Id: I3c9029554d8cbf7e5b49913af94ed0b0d606b933
diff --git a/README.mkdn b/README.mkdn
index 11cfbf8..fc99201 100644
--- a/README.mkdn
+++ b/README.mkdn
@@ -32,7 +32,7 @@
 
 Execute:
 
-    ./crowdin_sync.py --username your_gerrit_username --branch cm_version [--upload-sources] [--upload-translations] [--download]
+    ./crowdin_sync.py --username your_gerrit_username --branch cm_version --ticket jira_id [--upload-sources] [--upload-translations] [--download]
 
 Bugs
 ----