Merge pull request #1165 from LucasSaintarbor/update-install-cert-manager-instructions

Update command for installing cert-manager helm chart

versioned_docs/version-2.8/getting-started/installation-and-upgrade/install-upgrade-on-a-kubernetes-cluster/install-upgrade-on-a-kubernetes-cluster.md

@@ -160,7 +160,8 @@ helm repo update
 # Install the cert-manager Helm chart
 helm install cert-manager jetstack/cert-manager \
   --namespace cert-manager \
-  --create-namespace
+  --create-namespace \
+  --set installCRDs=true
 ```
 
 Once you’ve installed cert-manager, you can verify it is deployed correctly by checking the cert-manager namespace for running pods: