Upgrade Python syntax with pyupgrade --py38-plus

Author: hugovk

src/prompt_toolkit/layout/utils.py

@@ -5,7 +5,7 @@
 from prompt_toolkit.formatted_text.base import OneStyleAndTextTuple
 
 if TYPE_CHECKING:
-    from typing_extensions import SupportsIndex
+    from typing import SupportsIndex
 
 __all__ = [
     "explode_text_fragments",