docs(clb): fix docs (#2673)

Author: WeiMengXS

tencentcloud/services/clb/resource_tc_clb_instance.md

@@ -37,6 +37,22 @@ resource "tencentcloud_clb_instance" "internal_clb" {
 
 OPEN CLB
 
+```hcl
+resource "tencentcloud_clb_instance" "open_clb" {
+  network_type              = "OPEN"
+  clb_name                  = "myclb"
+  project_id                = 0
+  vpc_id                    = "vpc-da7ffa61"
+  security_groups           = ["sg-o0ek7r93"]
+
+  tags = {
+    test = "tf"
+  }
+}
+```
+
+SUPPORT CORS
+
 ```hcl
 resource "tencentcloud_clb_instance" "open_clb" {
   network_type              = "OPEN"

website/docs/r/clb_instance.html.markdown

@@ -48,6 +48,22 @@ resource "tencentcloud_clb_instance" "internal_clb" {
 
 ### OPEN CLB
 
+```hcl
+resource "tencentcloud_clb_instance" "open_clb" {
+  network_type    = "OPEN"
+  clb_name        = "myclb"
+  project_id      = 0
+  vpc_id          = "vpc-da7ffa61"
+  security_groups = ["sg-o0ek7r93"]
+
+  tags = {
+    test = "tf"
+  }
+}
+```
+
+### SUPPORT CORS
+
 ```hcl
 resource "tencentcloud_clb_instance" "open_clb" {
   network_type              = "OPEN"