chore: update docs to pve 9.1, fix example tests (#2350)

Signed-off-by: Pavel Boldyrev <627562+bpg@users.noreply.github.com>

Author: bpg

README.md

@@ -19,7 +19,7 @@ The project is not affiliated with [Proxmox Server Solutions GmbH](https://www.p
 
 ## Compatibility Promise
 
-This provider is compatible with Proxmox VE 9.x (currently **9.0**). See [Known Issues](#known-issues) below for compatibility details.
+This provider is compatible with Proxmox VE 9.x (currently **9.1**). See [Known Issues](#known-issues) below for compatibility details.
 
 > [!IMPORTANT]
 > Proxmox VE 8.x is supported, but some functionality might be limited or not work as expected. Testing against 8.x is not a priority, and issues specific to 8.x will not be addressed.
@@ -95,9 +95,9 @@ Work has started to migrate the provider to the new [Terraform Plugin Framework]
 
 ## Known Issues
 
-### Proxmox VE 9.0
+### Proxmox VE 9.x
 
-Proxmox VE 9.0 has a new API for managing HA resources, which is not yet supported by the provider, see [#2097](https://github.com/bpg/terraform-provider-proxmox/issues/2097) for more details.
+Proxmox VE 9.x has a new API for managing HA resources, which is not yet supported by the provider, see [#2097](https://github.com/bpg/terraform-provider-proxmox/issues/2097) for more details.
 
 `apt_*` resources / datasources do not support the new deb822 style format.
 

example/resource_virtual_environment_download_file.tf

@@ -5,8 +5,6 @@ resource "proxmox_virtual_environment_download_file" "ubuntu_24_04_lxc_img" {
   datastore_id        = "local"
   node_name           = data.proxmox_virtual_environment_nodes.example.names[0]
   url                 = var.ubuntu_24_04_lxc_img_url
-  checksum            = var.ubuntu_24_04_lxc_img_checksum
-  checksum_algorithm  = "sha256"
   upload_timeout      = 4444
   overwrite_unmanaged = true
 }

example/variables.tf

@@ -57,9 +57,3 @@ variable "ubuntu_24_04_lxc_img_url" {
   type        = string
   default     = "https://cloud-images.ubuntu.com/minimal/releases/noble/release/ubuntu-24.04-minimal-cloudimg-amd64-root.tar.xz"
 }
-
-variable "ubuntu_24_04_lxc_img_checksum" {
-  description = "The checksum for the Ubuntu 24.10 LXC image"
-  type        = string
-  default     = "bdc90f9c0908e45dc602208da8fbd9e38db6483a1483fc7042332f5cd4e9aa22"
-}