update readme

README.md

@@ -9,6 +9,7 @@ DNS Library for PHP with native Yggdrasil support
 ## Usage
 
 ### Resolve records
+
 ```
 var_dump(
     \Yggverse\Dns\Dig::records('yo.index', ['A', 'AAAA'])
@@ -17,18 +18,24 @@ var_dump(
 
 ## Check hostname valid
 
+```
 var_dump(
     \Yggverse\Dns\Dig::isHostName('yo.index')
 );
+```
 
 ## Check record valid
 
+```
 var_dump(
     \Yggverse\Dns\Dig::isRecord('A')
 );
+```
 
 ## Check record value valid
 
+```
 var_dump(
     \Yggverse\Dns\Dig::isRecordValue('A', '127.0.0.1')
 );
+```