Bump sphinx to 4.2 to build docs

Version 4.1 has problems with Python 3.10

diff --git a/psycopg/setup.py b/psycopg/setup.py
index c3cd7250a1292dac42300ddb80d318fd914e38d2..5f14bcb1d971bf6ba747a3f2d568c2edf698838b 100644 (file)
--- a/psycopg/setup.py
+++ b/psycopg/setup.py
@@ -55,7 +55,7 @@ extras_require = {
     ],
     # Requirements needed to build the documentation
     "docs": [
-        "Sphinx >= 4.1, < 4.2",
+        "Sphinx ~= 4.2, < 4.3",
         "docutils >= 0.17, < 0.18",
         "furo >= 2021.9.8",
         "sphinx-autobuild >= 2021.3.14",