[prometheus-nginx-exporter] Update Helm release nginx to v21.1.5 (#6052)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

charts/prometheus-nginx-exporter/Chart.lock

@@ -1,6 +1,6 @@
 dependencies:
 - name: nginx
   repository: https://charts.bitnami.com/bitnami
-  version: 21.1.4
-digest: sha256:a49d51ddb3bcb2df9df7442b9976c9f28e193ad06a9da347c60020cab2f6f36a
-generated: "2025-08-08T19:53:21.329559802Z"
+  version: 21.1.5
+digest: sha256:eb46b486e697856047eb055621e6a6cf6fb472ea7b4f14c763e28acccd683cdb
+generated: "2025-08-14T06:12:27.930861985Z"

charts/prometheus-nginx-exporter/Chart.yaml

@@ -2,7 +2,7 @@
 apiVersion: v2
 description: A Helm chart for NGINX Prometheus Exporter
 name: prometheus-nginx-exporter
-version: 1.11.2
+version: 1.11.3
 # renovate: github-releases=nginx/nginx-prometheus-exporter
 appVersion: 1.4.2
 home: https://github.com/nginxinc/nginx-prometheus-exporter
@@ -33,6 +33,6 @@ annotations:
 type: application
 dependencies:
   - name: nginx
-    version: "21.1.4"
+    version: "21.1.5"
     repository: https://charts.bitnami.com/bitnami
     condition: nginx.enabled