Update module github.com/nginxinc/nginx-plus-go-client/v2 to v2.2.0

| datasource | package                                     | from   | to     |
| ---------- | ------------------------------------------- | ------ | ------ |
| go         | github.com/nginxinc/nginx-plus-go-client/v2 | v2.1.0 | v2.2.0 |


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

Author: renovate[bot]

go.mod

@@ -4,7 +4,7 @@ go 1.22.6
 
 require (
 	github.com/alecthomas/kingpin/v2 v2.4.0
-	github.com/nginxinc/nginx-plus-go-client/v2 v2.1.0
+	github.com/nginxinc/nginx-plus-go-client/v2 v2.2.0
 	github.com/prometheus/client_golang v1.20.5
 	github.com/prometheus/common v0.61.0
 	github.com/prometheus/exporter-toolkit v0.13.2