Fix typo in name for disk write rate dashboard

Change-Id: I53e7810c01eead65407eca03f04ca48f6069446b
Related-Prod: PROD-33780
diff --git a/grafana/files/dashboards/linux/system_disk_prometheus.json b/grafana/files/dashboards/linux/system_disk_prometheus.json
index 1cb83f9..a9aafa5 100644
--- a/grafana/files/dashboards/linux/system_disk_prometheus.json
+++ b/grafana/files/dashboards/linux/system_disk_prometheus.json
@@ -930,7 +930,7 @@
       "thresholds": [],
       "timeFrom": null,
       "timeShift": null,
-      "title": "Disk read rate",
+      "title": "Disk write rate",
       "tooltip": {
         "shared": true,
         "sort": 0,
@@ -1151,4 +1151,4 @@
   "uid": null,
   "version": 6
 }
-{% endraw %}
\ No newline at end of file
+{% endraw %}