In PHP, use DeepL\Client, not DeepL\Translator

correcting error in a couple of other guides

Author: morsssss

docs/getting-started/intro.mdx

@@ -142,7 +142,7 @@ New user? Follow these quick steps to get started with the DeepL API.
 
         ```php Sample request
         require_once 'vendor/autoload.php';
-        use DeepL\Translator;
+        use DeepL\Client;
 
         $authKey = "{YOUR_API_KEY}"; // replace with your key
         $deeplClient = new \DeepL\DeepLClient($authKey);

docs/getting-started/your-first-api-request.mdx

@@ -104,7 +104,7 @@ We included text translation examples for our [client libraries](/docs/getting-s
   <Tab title="PHP">
     ```php
     require_once 'vendor/autoload.php';
-    use DeepL\Translator;
+    use DeepL\Client;
 
     $authKey = "f63c02c5-f056-..."; // Replace with your key
     $deeplClient = new \DeepL\DeepLClient($authKey);