[stable/prometheus] harmonization of regex reference without braces (helm#10055)

Signed-off-by: Pierre DEMAGNY <[email protected]>

Author: pdemagny

stable/prometheus/Chart.yaml

@@ -1,5 +1,5 @@
 name: prometheus
-version: 8.1.1
+version: 8.1.2
 appVersion: 2.5.0
 description: Prometheus is a monitoring system and time series database.
 home: https://prometheus.io/

stable/prometheus/values.yaml

@@ -970,7 +970,7 @@ serverFiles:
           - source_labels: [__meta_kubernetes_node_name]
             regex: (.+)
             target_label: __metrics_path__
-            replacement: /api/v1/nodes/${1}/proxy/metrics
+            replacement: /api/v1/nodes/$1/proxy/metrics
 
 
       - job_name: 'kubernetes-nodes-cadvisor'
@@ -1002,7 +1002,7 @@ serverFiles:
         # This configuration will work only on kubelet 1.7.3+
         # As the scrape endpoints for cAdvisor have changed
         # if you are using older version you need to change the replacement to
-        # replacement: /api/v1/nodes/${1}:4194/proxy/metrics
+        # replacement: /api/v1/nodes/$1:4194/proxy/metrics
         # more info here https://github.com/coreos/prometheus-operator/issues/633
         relabel_configs:
           - action: labelmap
@@ -1012,7 +1012,7 @@ serverFiles:
           - source_labels: [__meta_kubernetes_node_name]
             regex: (.+)
             target_label: __metrics_path__
-            replacement: /api/v1/nodes/${1}/proxy/metrics/cadvisor
+            replacement: /api/v1/nodes/$1/proxy/metrics/cadvisor
 
       # Scrape config for service endpoints.
       #