/etc/nginx/ssl/nginx.crt: No such file or directory. Instead use tls.crt (#18324)

Running the example into a katacoda environment I get this error message:
(77) error setting certificate verify locations:
  CAfile: /etc/nginx/ssl/nginx.crt


$ kubectl exec curl-deployment-f8c5c685b-9sphf -- ls /etc/nginx/ssl/
tls.crt
tls.key
$ kubectl exec curl-deployment-f8c5c685b-9sphf -- curl https://my-nginx --cacert /etc/nginx/ssl/tls.crt
...
<title>Welcome to nginx!</title>
...

$ kubectl version
Client Version: version.Info{Major:"1", Minor:"17", GitVersion:"v1.17.0", GitCommit:"70132b0f130acc0bed193d9ba59dd186f0e634cf", GitTreeState:"clean", BuildDate:"2019-12-07T21:20:10Z", GoVersion:"go1.13.4", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"17", GitVersion:"v1.17.0", GitCommit:"70132b0f130acc0bed193d9ba59dd186f0e634cf", GitTreeState:"clean", BuildDate:"2019-12-07T21:12:17Z", GoVersion:"go1.13.4", Compiler:"gc", Platform:"linux/amd64"}

$ kubectl describe secret nginxsecret
Name:         nginxsecret
Namespace:    default
Labels:       <none>
Annotations:  <none>

Type:  kubernetes.io/tls

Data
====
tls.crt:  1164 bytes
tls.key:  1708 bytes

Author: melvinrmc

content/en/docs/concepts/services-networking/connect-applications-service.md

@@ -338,7 +338,7 @@ NAME                               READY     STATUS    RESTARTS   AGE
 curl-deployment-1515033274-1410r   1/1       Running   0          1m
 ```
 ```shell
-kubectl exec curl-deployment-1515033274-1410r -- curl https://my-nginx --cacert /etc/nginx/ssl/nginx.crt
+kubectl exec curl-deployment-1515033274-1410r -- curl https://my-nginx --cacert /etc/nginx/ssl/tls.crt
 ...
 <title>Welcome to nginx!</title>
 ...