Add documentation for second network interface (#10310)

* Add documentation for second network interface

* Add specification on maximum number of NIC supported

* Add documentation for second network interface with support on bottlerocket

Author: peirulu

docs/content/en/docs/getting-started/vsphere/vsphere-spec.md

@@ -102,6 +102,9 @@ spec:
   numCPUs: <span style="color:green">2</span>                           <a href="#numcpus-optional"># Number of CPUs on virtual machines</a>
   memoryMiB: <span style="color:green">8192</span>                      <a href="#memorymib-optional"># Size of RAM on VMs</a>
   osFamily: <span>"bottlerocket"</span>             <a href="#osfamily-optional"># Operating system on VMs</a>
+  networks: <a href="#networks-optional"># Configure second network interface on workernode (optional)</a>
+  - <span>"network-1"</span> 
+  - <span>"network-2"</span> 
   resourcePool: <span>"resourcePool1"</span>        <a href="#resourcepool-required"># vSphere resource pool for EKS Anywhere VMs (required)</a>
   storagePolicyName: <span>"storagePolicy1"</span>  <a href="#storagepolicyname-optional"># Storage policy name associated with VMs</a>
   template: <span>"bottlerocket-kube-v1-31"</span>  <a href="#template-optional"># VM template for EKS Anywhere (required for RHEL/Ubuntu-based OVAs)</a>
@@ -313,6 +316,17 @@ Operating System on virtual machines. Permitted values: bottlerocket, ubuntu, re
 ### diskGiB (optional)
 Size of disk on virtual machines if snapshots aren't included (Default: 25)
 
+### networks (optional)
+The path to the VM network to deploy your EKS Anywhere cluster on. For example, `/<DATACENTER>/network/<NETWORK_NAME>`. Use the array to specify the networks you want to use, the first network in the array will serve as the primary interface and is highly recommended to use the same <a href="#network-required">network </a> configured in datacenter section.Use `govc find -type n` to see a list of networks
+
+>**_Important Limitations_**
+- **Multi-Network Interface Support:**
+  - Multiple network interfaces are **only supported on worker nodes** and NOT supported on controlplane node
+  - Maximum of 2 network interfaces per worker node.
+- **Operating System Compatibility:**
+  - **EKSA CLI v0.24.0+**: Ubuntu and RHEL operating systems supported
+  - **EKSA CLI v0.24.1+**: Bottlerocket operating system supported
+
 ### users (optional)
 The users you want to configure to access your virtual machines. Only one is permitted at this time