Fix typo and layout in /setup/additional-setup/cni/ (#12376)

content/en/docs/setup/additional-setup/cni/index.md

@@ -96,10 +96,10 @@ Some platforms required special installation settings.
 
 * Google Kubernetes Engine
 
-{{< text yaml >}}
-apiVersion: install.istio.io/v1alpha1
-kind: IstioOperator
-spec:
+    {{< text yaml >}}
+    apiVersion: install.istio.io/v1alpha1
+    kind: IstioOperator
+    spec:
       components:
         cni:
           enabled: true
@@ -107,14 +107,14 @@ spec:
       values:
         cni:
           cniBinDir: /home/kubernetes/bin
-{{< /text >}}
+    {{< /text >}}
 
 * Red Hat OpenShift 4.2+
 
-{{< text yaml >}}
-apiVersion: install.istio.io/v1alpha1
-kind: IstioOperator
-spec:
+    {{< text yaml >}}
+    apiVersion: install.istio.io/v1alpha1
+    kind: IstioOperator
+    spec:
       components:
         cni:
           enabled: true
@@ -128,7 +128,7 @@ spec:
           cniConfDir: /etc/cni/multus/net.d
           cniConfFileName: istio-cni.conf
           chained: false
-{{< /text >}}
+    {{< /text >}}
 
 ## Operation details
 
@@ -234,7 +234,7 @@ The Istio CNI plugin operates as a chained CNI plugin.  This means its configura
 CNI plugins configuration as a new configuration list element. See the
 [CNI specification reference](https://github.com/containernetworking/cni/blob/master/SPEC.md#network-configuration-lists) for further details.
 When a pod is created or deleted, the container runtime invokes each plugin in the list in order. The Istio
-CNI plugin only performs actions to setup the application pod's traffic redirection to the injected Istio proxy
+CNI plugin only performs actions to set up the application pod's traffic redirection to the injected Istio proxy
 sidecar (using `iptables` in the pod's network namespace).
 
 {{< warning >}}