Update setup.py

drop sphinx-autobuild dep back to allow py3.8 to install

Author: pacrob

setup.py

@@ -17,7 +17,7 @@
     ],
     "docs": [
         "sphinx>=6.0.0",
-        "sphinx-autobuild>=2024.2.4",
+        "sphinx-autobuild>=2021.3.14",
         "sphinx_rtd_theme>=1.0.0",
         "towncrier>=21,<22",
     ],