update hostname variable formats (#16991)

Author: patriciasantaana

src/content/docs/api-shield/management-and-monitoring/index.mdx

@@ -75,21 +75,20 @@ Cloudflare supports hostname variables in the following formats:
 
 ```txt
 
-Unknown macro: {hostVar1}.example.com
-
-.foo.example.com
+{hostVar1}.example.com
 
 foo.{hostVar1}.example.com
 
-Unknown macro: {hostVar2}.{hostVar1}.example.com
+{hostVar2}.{hostVar1}.example.com
 ```
 
 Hostname variables must comprise the entire domain field and must not be used with other text in the field. 
 
 The following format is not supported: 
 
 ```txt
-foo-{hostVar1}.example.com.
+
+foo-{hostVar1}.example.com
 ```
 
 For more information on how Cloudflare uses variables in API Shield, refer to the examples from [API Discovery](/api-shield/security/api-discovery/).