Fix typo in name for disk write rate dashboard

Change-Id: I056b33dcff3534520e7cc5067bbcec02a17c8e5e
Related-Prod: PROD-33780
(cherry picked from commit ee7ff5823795543f019af4779d7b0af09d411f82)
diff --git a/linux/files/grafana_dashboards/system_disk_prometheus.json b/linux/files/grafana_dashboards/system_disk_prometheus.json
index 14dc2c5..55786c3 100644
--- a/linux/files/grafana_dashboards/system_disk_prometheus.json
+++ b/linux/files/grafana_dashboards/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,