[CLEANUP] Avoid magic method forwarding in Charset (#1160)

Part of #1147

Author: oliverklee

config/phpstan-baseline.neon

@@ -66,12 +66,6 @@ parameters:
 			count: 1
 			path: ../src/Property/CSSNamespace.php
 
-		-
-			message: '#^Call to an undefined method Sabberworm\\CSS\\OutputFormat\:\:comments\(\)\.$#'
-			identifier: method.notFound
-			count: 1
-			path: ../src/Property/Charset.php
-
 		-
 			message: '#^Method Sabberworm\\CSS\\Property\\Charset\:\:atRuleArgs\(\) should return string but returns Sabberworm\\CSS\\Value\\CSSString\.$#'
 			identifier: return.type

src/Property/Charset.php

@@ -81,7 +81,7 @@ public function __toString(): string
 
     public function render(OutputFormat $outputFormat): string
     {
-        return "{$outputFormat->comments($this)}@charset {$this->charset->render($outputFormat)};";
+        return "{$outputFormat->getFormatter()->comments($this)}@charset {$this->charset->render($outputFormat)};";
     }
 
     /**