Update module github.com/nginxinc/nginx-gateway-fabric to v0.6.0

| datasource | package                                  | from   | to     |
| ---------- | ---------------------------------------- | ------ | ------ |
| go         | github.com/nginxinc/nginx-gateway-fabric | v0.0.0 | v0.6.0 |


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

tests/go.mod

@@ -3,7 +3,7 @@ module github.com/nginxinc/nginx-gateway-fabric/tests
 go 1.22.2
 
 require (
-	github.com/nginxinc/nginx-gateway-fabric v0.0.0
+	github.com/nginxinc/nginx-gateway-fabric v0.6.0
 	github.com/onsi/ginkgo/v2 v2.20.1
 	github.com/onsi/gomega v1.34.1
 	github.com/prometheus/client_golang v1.20.1