fix: php 8.3 deprecated get_class method call without argument (#2509)

Author: AmooAti

src/Http/REST.php

@@ -55,7 +55,7 @@ public static function execute(
         $runner = new Runner(
             $config,
             sprintf('%s %s', $request->getMethod(), (string) $request->getUri()),
-            [get_class(), 'doExecute'],
+            [self::class, 'doExecute'],
             [$client, $request, $expectedClass]
         );