Correct unit on the Y axis for Zookeeper watch count

Fixes PROD-34649

Change-Id: I949e8d4956e7241fc0c691f6c6528709a15a40b2
diff --git a/opencontrail/files/grafana_dashboards/zookeeper_prometheus.json b/opencontrail/files/grafana_dashboards/zookeeper_prometheus.json
index 094f000..1991f1d 100644
--- a/opencontrail/files/grafana_dashboards/zookeeper_prometheus.json
+++ b/opencontrail/files/grafana_dashboards/zookeeper_prometheus.json
@@ -1716,7 +1716,7 @@
       },
       "yaxes": [
         {
-          "format": "ms",
+          "format": "short",
           "label": null,
           "logBase": 1,
           "max": null,
@@ -2031,4 +2031,4 @@
   "uid": null,
   "version": 33
 }
-{% endraw %}
\ No newline at end of file
+{% endraw %}