Set log scaling for secured cores and total secured cores charts (#337)

Author: kurlov

resources/grafana/generated/dashboards/rhacs-cluster-overview.yaml

@@ -301,7 +301,7 @@
             "lineWidth": 1,
             "pointSize": 5,
             "scaleDistribution": {
-              "type": "linear"
+              "type": "log"
             },
             "showPoints": "never",
             "spanNulls": false,
@@ -509,7 +509,7 @@
             "lineWidth": 1,
             "pointSize": 5,
             "scaleDistribution": {
-              "type": "linear"
+              "type": "log"
             },
             "showPoints": "never",
             "spanNulls": false,