chore: clear decoded cache in decodeUsing function

Author: albertcht

src/http-client/src/Response.php

@@ -106,6 +106,7 @@ public function object(): array|object|null
     public function decodeUsing(?Closure $callback): static
     {
         $this->decodeUsing = $callback;
+        $this->decoded = [];
 
         return $this;
     }