Update quay.io/prometheus/pushgateway Docker tag to v1.11.0

Author: renovate-bot

apps/monitoring/pushgateway/deployment.yaml

@@ -31,7 +31,7 @@ spec:
           type: RuntimeDefault
       containers:
         - name: pushgateway
-          image: quay.io/prometheus/pushgateway:v1.10.0
+          image: quay.io/prometheus/pushgateway:v1.11.0
           args: []
           ports:
             - containerPort: 9091