fix for CreateIndex constructor

Author: hkulekci

src/Models/Request/CreateIndex.php

@@ -8,8 +8,20 @@
 
 class CreateIndex implements RequestModel
 {
-    public function __construct(protected string $fieldName, protected ?array $fieldSchema = null)
+    protected string $fieldName;
+    protected ?array $fieldSchema;
+
+    public function __construct(string $fieldName, array|string $fieldSchema = null)
     {
+        if (is_string($fieldSchema)) {
+            $this->fieldSchema = [
+                'type' => $fieldSchema
+            ];
+        } else {
+            $this->fieldSchema = $fieldSchema;
+        }
+
+        $this->fieldName = $fieldName;
     }
 
     public function toArray(): array