Update module github.com/nginxinc/nginx-prometheus-exporter to v1.5.1

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

Author: renovate[bot]

go.mod

@@ -21,7 +21,7 @@ require (
 	github.com/moby/moby/api v1.54.1
 	github.com/moby/moby/client v0.4.0
 	github.com/nginx/nginx-plus-go-client/v3 v3.0.1
-	github.com/nginxinc/nginx-prometheus-exporter v1.3.0
+	github.com/nginxinc/nginx-prometheus-exporter v1.5.1
 	github.com/nxadm/tail v1.4.11
 	github.com/open-telemetry/opentelemetry-collector-contrib/exporter/prometheusexporter v0.141.0
 	github.com/open-telemetry/opentelemetry-collector-contrib/extension/headerssetterextension v0.141.0