fix(clb): [118412226] tencentcloud_clb_instance update doc (#2956)

* add

* add

* add

Author: SevenEarth

Diff for: .changelog/2956.txt

@@ -0,0 +1,3 @@
+```release-note:enhancement
+resource/tencentcloud_clb_instance: update doc
+```

Diff for: tencentcloud/services/clb/resource_tc_clb_instance.go

@@ -79,7 +79,7 @@ func ResourceTencentCloudClbInstance() *schema.Resource {
 				Type:        schema.TypeString,
 				Optional:    true,
 				Computed:    true,
-				Description: "IP version, only applicable to open CLB. Valid values are `ipv4`, `ipv6` and `IPv6FullChain`.",
+				Description: "It's only applicable to public network CLB instances. IP version. Values: `IPV4`, `IPV6` and `IPv6FullChain` (case-insensitive). Default: `IPV4`. Note: IPV6 indicates IPv6 NAT64, while IPv6FullChain indicates IPv6.",
 			},
 			"internet_charge_type": {
 				Type:        schema.TypeString,

Diff for: website/docs/r/clb_instance.html.markdown

@@ -481,7 +481,7 @@ The following arguments are supported:
 
 * `clb_name` - (Required, String) Name of the CLB. The name can only contain Chinese characters, English letters, numbers, underscore and hyphen '-'.
 * `network_type` - (Required, String, ForceNew) Type of CLB instance. Valid values: `OPEN` and `INTERNAL`.
-* `address_ip_version` - (Optional, String) IP version, only applicable to open CLB. Valid values are `ipv4`, `ipv6` and `IPv6FullChain`.
+* `address_ip_version` - (Optional, String) It's only applicable to public network CLB instances. IP version. Values: `IPV4`, `IPV6` and `IPv6FullChain` (case-insensitive). Default: `IPV4`. Note: IPV6 indicates IPv6 NAT64, while IPv6FullChain indicates IPv6.
 * `bandwidth_package_id` - (Optional, String) Bandwidth package id. If set, the `internet_charge_type` must be `BANDWIDTH_PACKAGE`.
 * `cluster_id` - (Optional, String, ForceNew) Cluster ID.
 * `delete_protect` - (Optional, Bool) Whether to enable delete protection.