Disable colorValue in "Available Capacity" panel

In case of 100% Available Capacity it looks like 00.0%.
See the diff on https://imgur.com/fqZad7S

Change-Id: Ib74621a0f91d73a7c019b1303fad473c1681f383
diff --git a/ceph/files/grafana_dashboards/ceph_cluster_prometheus.json b/ceph/files/grafana_dashboards/ceph_cluster_prometheus.json
index 33e4589..d6fd822 100644
--- a/ceph/files/grafana_dashboards/ceph_cluster_prometheus.json
+++ b/ceph/files/grafana_dashboards/ceph_cluster_prometheus.json
@@ -937,7 +937,7 @@
         {
           "cacheTimeout": null,
           "colorBackground": false,
-          "colorValue": true,
+          "colorValue": false,
           "colors": [
             "rgba(245, 54, 54, 0.9)",
             "rgba(237, 129, 40, 0.89)",