[stable/prometheus] update prometheus.io/port regex (#3961)

* [stable/prometheus] update prometheus.io/port regex

* [stable/prometheus] update prometheus.io/port replacement field

stable/prometheus/Chart.yaml

@@ -1,5 +1,5 @@
 name: prometheus
-version: 5.4.0
+version: 5.4.1
 description: Prometheus is a monitoring system and time series database.
 home: https://prometheus.io/
 icon: https://raw.githubusercontent.com/prometheus/prometheus.github.io/master/assets/prometheus_logo-cb55bb5c346.png

stable/prometheus/values.yaml

@@ -834,7 +834,7 @@ serverFiles:
           - source_labels: [__address__, __meta_kubernetes_service_annotation_prometheus_io_port]
             action: replace
             target_label: __address__
-            regex: (.+)(?::\d+);(\d+)
+            regex: ([^:]+)(?::\d+)?;(\d+)
             replacement: $1:$2
           - action: labelmap
             regex: __meta_kubernetes_service_label_(.+)
@@ -911,8 +911,8 @@ serverFiles:
             regex: (.+)
           - source_labels: [__address__, __meta_kubernetes_pod_annotation_prometheus_io_port]
             action: replace
-            regex: (.+):(?:\d+);(\d+)
-            replacement: ${1}:${2}
+            regex: ([^:]+)(?::\d+)?;(\d+)
+            replacement: $1:$2
             target_label: __address__
           - action: labelmap
             regex: __meta_kubernetes_pod_label_(.+)