Manual fix issue flagged by Ruff

Author: browniebroke

drf_excel/renderers.py

@@ -1,7 +1,6 @@
 import json
 from collections.abc import Iterable, MutableMapping
 from tempfile import TemporaryFile
-from typing import Dict
 
 from django.utils.functional import Promise
 from openpyxl import Workbook
@@ -315,7 +314,7 @@ def _get_label(parent_label, label_sep, obj):
 
         return _header_dict
 
-    def _flatten_data(self, data, parent_key="", key_sep=".") -> Dict[str, XLSXField]:
+    def _flatten_data(self, data, parent_key="", key_sep=".") -> dict[str, XLSXField]:
         items = []
         for k, v in data.items():
             new_key = f"{parent_key}{key_sep}{k}" if parent_key else k