Fix a type issue

Author: abrookins

redisvl/schema/schema.py

@@ -170,12 +170,12 @@ def _make_field(storage_type, **field_inputs) -> BaseField:
 
     @root_validator(pre=True)
     @classmethod
-    def validate_and_create_fields(cls, values):
+    def validate_and_create_ields(cls, values: Dict[str, Any]) -> Dict[str, Any]:
         """
         Validate uniqueness of field names and create valid field instances.
         """
         # Ensure index is a dictionary for validation
-        index = values.get("index")
+        index = values.get("index", {})
         if not isinstance(index, IndexInfo):
             index = IndexInfo(**index)