Update module github.com/nginxinc/nginx-prometheus-exporter to v1.4.2

| datasource | package                                       | from   | to     |
| ---------- | --------------------------------------------- | ------ | ------ |
| go         | github.com/nginxinc/nginx-prometheus-exporter | v1.3.0 | v1.4.2 |


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

Author: renovate[bot]

go.mod

@@ -8,7 +8,7 @@ require (
 	github.com/google/go-cmp v0.7.0
 	github.com/nginx/telemetry-exporter v0.1.4
 	github.com/nginxinc/nginx-plus-go-client v1.3.0
-	github.com/nginxinc/nginx-prometheus-exporter v1.3.0
+	github.com/nginxinc/nginx-prometheus-exporter v1.4.2
 	github.com/onsi/ginkgo/v2 v2.23.4
 	github.com/onsi/gomega v1.37.0
 	github.com/prometheus/client_golang v1.20.5