fix: update boot_iso section, fix var names, and pin proxmox plugin version

builds/linux/rocky/8/linux-rocky.pkr.hcl

@@ -7,18 +7,18 @@
 //  The Packer configuration.
 
 packer {
-  required_version = ">= 1.9.1"
+  required_version = ">= 1.12.0"
   required_plugins {
     ansible = {
       source  = "github.com/hashicorp/ansible"
       version = "~> 1"
     }
     git = {
-      version = ">= 0.4.2"
+      version = ">= 0.6.2"
       source  = "github.com/ethanmdavidson/git"
     }
     proxmox = {
-      version = ">= 1.0.6"
+      version = "= 1.2.1"
       source  = "github.com/hashicorp/proxmox"
     }
   }
@@ -53,7 +53,7 @@ locals {
     "text ${local.data_source_command}",
     // This sends the "enter" key, waits, turns on the left control key, sends the "x" key, and then turns off the left control key. This is used to save the changes and exit the boot menu option's configuration, and then continue the boot process.
     "<enter><wait><leftCtrlOn>x<leftCtrlOff>"
-  ]  
+  ]
 
   build_by          = "Built by: HashiCorp Packer ${packer.version}"
   build_date        = formatdate("DD-MM-YYYY hh:mm ZZZ", "${timestamp()}" )
@@ -103,7 +103,7 @@ locals {
 //  Defines the builder configuration blocks.
 
 source "proxmox-iso" "linux-rocky" {
- 
+
   // Proxmox Connection Settings and Credentials
   proxmox_url              = "https://${var.proxmox_hostname}:8006/api2/json"
   username                 = "${var.proxmox_api_token_id}"
@@ -122,12 +122,14 @@ source "proxmox-iso" "linux-rocky" {
   memory          = "${var.vm_mem_size}"
   os              = "${var.vm_os_type}"
   scsi_controller = "${var.vm_disk_controller_type}"
+
   disks {
     disk_size     = "${var.vm_disk_size}"
     type          = "${var.vm_disk_type}"
     storage_pool  = "${var.vm_storage_pool}"
     format        = "${var.vm_disk_format}"
   }
+
   dynamic "efi_config" {
     for_each = var.vm_bios == "ovmf" ? [1] : []
     content {
@@ -136,13 +138,11 @@ source "proxmox-iso" "linux-rocky" {
       pre_enrolled_keys = var.vm_bios == "ovmf" ? var.vm_efi_pre_enrolled_keys : null
     }
   }
-  unmount_iso     = true
+
   ssh_username    = "${var.build_username}"
   ssh_password    = "${var.build_password}"
   ssh_timeout     = "${var.timeout}"
   ssh_port        = "22"
-  iso_file        = "${var.common_iso_storage}:${var.iso_path}/${var.iso_file}"
-  iso_checksum    = "${var.iso_checksum}"
   qemu_agent      = true
 
   network_adapters {
@@ -155,6 +155,7 @@ source "proxmox-iso" "linux-rocky" {
   http_content = "${var.common_data_source}" == "http" ? "${local.data_source_content}" : null
 
   // Boot and Provisioning Settings
+  http_interface    = var.common_data_source == "http" ? var.common_http_interface : null
   http_bind_address = var.common_data_source == "http" ? var.common_http_bind_address : null
   http_port_min     = var.common_data_source == "http" ? var.common_http_port_min : null
   http_port_max     = var.common_data_source == "http" ? var.common_http_port_max : null
@@ -162,6 +163,12 @@ source "proxmox-iso" "linux-rocky" {
   boot_wait         = var.vm_boot_wait
   boot_command      = local.boot_command
 
+  boot_iso {
+    iso_file      = "${var.common_iso_storage}:${var.iso_path}/${var.iso_file}"
+    unmount       = true
+    iso_checksum  = "${var.iso_checksum}"
+  }
+
   dynamic "additional_iso_files" {
     for_each = var.common_data_source == "disk" ? [1] : []
     content {