fix(deps): update module github.com/prometheus/client_golang to v1.18.0

Author: renovate[bot]

go.mod

@@ -7,7 +7,7 @@ require (
 	github.com/google/uuid v1.3.0
 	github.com/onsi/ginkgo v1.16.5
 	github.com/onsi/gomega v1.22.1
-	github.com/prometheus/client_golang v1.13.0
+	github.com/prometheus/client_golang v1.18.0
 	k8s.io/api v0.22.4
 	k8s.io/apimachinery v0.22.4
 	k8s.io/client-go v0.22.4