Update quay.io/jetstack/cert-manager-webhook Docker tag to v1.19.1

| datasource | package                               | from   | to      |
| ---------- | ------------------------------------- | ------ | ------- |
| docker     | quay.io/jetstack/cert-manager-webhook | v1.9.1 | v1.19.1 |


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

Author: renovate[bot]

tests/data/virtual-server-certmanager/certmanager.yaml

@@ -5288,7 +5288,7 @@ spec:
         runAsNonRoot: true
       containers:
         - name: cert-manager
-          image: "quay.io/jetstack/cert-manager-webhook:v1.9.1"
+          image: "quay.io/jetstack/cert-manager-webhook:v1.19.1"
           imagePullPolicy: IfNotPresent
           args:
           - --log-level=debug