docs(apple-silicon): improve example and add private_network informations

Author: Laure-di

docs/resources/apple_silicon_server.md

@@ -13,12 +13,34 @@ see the [API documentation](https://www.scaleway.com/en/developers/api/apple-sil
 ### Basic
 
 ```terraform
-resource "scaleway_apple_silicon_server" "server" {
+resource scaleway_apple_silicon_server server {
   name = "test-m1"
   type = "M1-M"
 }
 ```
 
+### Enable VPC and attach private network
+
+```terraform
+resource scaleway_vpc vpc-apple-silicon {
+  name = "vpc-apple-silicon"
+}
+
+resource scaleway_vpc_private_network pn-apple-silicon {
+  name = "pn-apple-silicon"
+  vpc_id = scaleway_vpc.vpc-apple-silicon.id
+}
+
+resource scaleway_apple_silicon_server my-server {
+    name = "TestAccServerEnableVPC"
+    type = "M2-M"
+    enable_vpc = true
+    private_network {
+      id = scaleway_vpc_private_network.pn-apple-silicon.id
+    }
+}
+```
+
 ## Argument Reference
 
 The following arguments are supported:
@@ -36,10 +58,15 @@ The following arguments are supported:
   associated with.
 - `enable_vpc` - (Optional, Default: false): Enables the VPC option when set to true.
 
+- `private_network` - (Optional) The private networks to attach to the server
+        - `id` - The private network ID
+        - `ipam_ip_ids` - A list of IPAM IP IDs to attach to the server.
+
 - `commitment_type` (Optional, Default: duration_24h): Activate commitment for this server
 
 - `public_bandwidth` (Optional) Configure the available public bandwidth for your server in bits per second. This option may not be available for all offers.
 
+
 ## Attributes Reference
 
 In addition to all arguments above, the following attributes are exported:
@@ -59,6 +86,11 @@ In addition to all arguments above, the following attributes are exported:
 - `deleted_at` - The minimal date and time on which you can delete this server due to Apple licence.
 - `organization_id` - The organization ID the server is associated with.
 - `vpc_status` - The current status of the VPC option.
+- `private_network` - The private networks to attach to the server
+      - `vlan`  - The VLAN ID associated with the private network.
+      - `status` - The current status of the private network.
+      - `created_at` - The date and time the private network was created.
+      - `updated_at` - The date and time the private network was last updated.
 
 ## Import