[readme] feat: added link to proxmox-iso builder

readme.md

@@ -2,6 +2,10 @@
 Packer is a tool that can create Virtual Machine templates from code.  
 This repository hosts the code for a customized templates used in Siempie's home environment using the Proxmox Hypervisor.  
 
+More info:
+https://developer.hashicorp.com/packer/docs/intro
+https://developer.hashicorp.com/packer/integrations/hashicorp/proxmox/latest/components/builder/iso
+
 # Inside the Template
 Inside the template packer does:
  - Install updates
@@ -13,8 +17,6 @@ Other information to know:
  - Template hostname: `localhost`
  - packer username: `packer`
  - packer password: `packer`
-  
-More info: https://developer.hashicorp.com/packer/docs/intro
 
 | OS | VM Name | VM ID | Script | 
 |----|---------|-------|--------|