Update .gitlab/dashboards/multiple_time_series.yml

.gitlab/dashboards/multiple_time_series.yml

 dashboard: 'Multiple time series'
 panel_groups:
-  - group: 'Memory'
+  - group: 'Multiple time series'
     panels:
-      - title: "Memories"
+      - title: "Multiple metrics w/one time series each"
         type: area-chart
         y_label: "MB"
         metrics:
@@ -14,7 +14,7 @@ panel_groups:
             query_range: 'avg(sum(container_memory_usage_bytes{container_name!="POD",pod_name=~"^%{ci_environment_slug}-([^c].*|c([^a]|a([^n]|n([^a]|a([^r]|r[^y])))).*|)-(.*)",namespace="%{kube_namespace}"}) by (job)) without (job) / count(avg(container_memory_usage_bytes{container_name!="POD",pod_name=~"^%{ci_environment_slug}-([^c].*|c([^a]|a([^n]|n([^a]|a([^r]|r[^y])))).*|)-(.*)",namespace="%{kube_namespace}"}) without (job)) /1000/1000'
             label: "memory_1000"
             unit: "count"
-      - title: "Prometheus http response size bytes bucket"
+      - title: "One metric w/multiple time series"
         type: area-chart
         y_label: "req"
         metrics: