fix: the wrong panel title on the sample dashboard (argoproj#1260)

Signed-off-by: Hui Kang <[email protected]>

Author: huikang

examples/dashboard.json

@@ -671,7 +671,7 @@
       "tableColumn": "",
       "targets": [
         {
-          "expr": "sum(rollout_phase{phase=\"Paused\"} == 1)",
+          "expr": "sum(rollout_phase{phase=\"Error\"} == 1)",
           "format": "time_series",
           "hide": false,
           "intervalFactor": 1,
@@ -1126,4 +1126,4 @@
   "title": "Argo Rollouts",
   "uid": "9zNpieqik",
   "version": 5
-}
+}