style(docx): apply Ruff formatting to msword_backend

Signed-off-by: Emre Çalışır <emrecalisir95@gmail.com>

Author: emreclsr

docling/backend/msword_backend.py

@@ -1286,9 +1286,8 @@ def _add_list_item(
 
         level = self._get_level()
         prev_indent = self._prev_indent()
-        if (
-            self._prev_numid() is None
-            or (self._prev_numid() == numid and self.level_at_new_list is None)
+        if self._prev_numid() is None or (
+            self._prev_numid() == numid and self.level_at_new_list is None
         ):  # Open new list
             self.level_at_new_list = level