Fix Python 3.8 support

Author: Gallaecio

CHANGES.rst

@@ -2,6 +2,12 @@
 Release notes
 =============
 
+0.6.1 (unreleased)
+==================
+
+Fixed Pythonb 3.8 support.
+
+
 0.6.0 (2025-09-16)
 ==================
 

sphinx_scrapy/__init__.py

@@ -1,7 +1,12 @@
-from collections.abc import Generator
+from __future__ import annotations
 
-from sphinx.application import Sphinx
-from sphinx.config import Config
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from collections.abc import Generator
+
+    from sphinx.application import Sphinx
+    from sphinx.config import Config
 
 INTERSPHINX_MAPPING = {
     "attrs": ("https://www.attrs.org/en/stable/", None),