[prometheus-nginx-exporter] Update Helm release nginx to v21.1.22 (#6061)

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: 21.1.21
-digest: sha256:3563f9b6cc31ed2c0264b19baf8a9a0718365f94168bf02a43d512e652a6170e
-generated: "2025-08-15T18:01:33.791312043Z"
+  version: 21.1.22
+digest: sha256:c8c61412bfb279702f98031dd354aca3331b2646f4e1ecbb075fbe2c6ef0f96c
+generated: "2025-08-16T14:14:58.002034515Z"

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: 1.11.7
+version: 1.11.8
 # 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: "21.1.21"
+    version: "21.1.22"
     repository: https://charts.bitnami.com/bitnami
     condition: nginx.enabled