OCPBUGS-20300: small agent yaml fixes

Author: skopacz1

modules/installing-ocp-agent-inputs.adoc

@@ -50,7 +50,7 @@ $ cat << EOF > ./my-cluster/install-config.yaml
 apiVersion: v1
 baseDomain: test.example.com
 compute:
-  architecture: amd64 <1>
+- architecture: amd64 <1>
   hyperthreading: Enabled
   name: worker
   replicas: 0
@@ -66,7 +66,7 @@ networking:
   - cidr: 10.128.0.0/14
     hostPrefix: 23
   machineNetwork:
-  - cidr: 192.168.111.0/16
+  - cidr: 192.168.0.0/16
   networkType: OVNKubernetes <3>
   serviceNetwork:
   - 172.30.0.0/16