update readme

README.md

@@ -214,6 +214,17 @@ var_dump(
 );
 ```
 
+### Valid
+
+Network entities validation
+
+**Supported methods**
+
+* `Valid::ip`
+* `Valid::ip4`
+* `Valid::ip6`
+* `Valid::domainHostName`
+
 ## Integrations
 
 * [Network API with native Yggdrasil/IPv6 support](https://github.com/YGGverse/web-api)