Update module github.com/cert-manager/cert-manager to v1.19.1

Author: renovate[bot]

go.mod

@@ -9,7 +9,7 @@ toolchain go1.24.5
 replace k8s.io/client-go => k8s.io/client-go v0.33.3
 
 require (
-	github.com/cert-manager/cert-manager v1.17.2
+	github.com/cert-manager/cert-manager v1.19.1
 	github.com/gophercloud/gophercloud v0.14.0
 	github.com/sirupsen/logrus v1.9.3
 	github.com/stretchr/testify v1.10.0