Try building a pp311 wheel

Signed-off-by: Michał Górny <mgorny@gentoo.org>

Author: mgorny

pyproject.toml

@@ -11,5 +11,4 @@ build-backend = "setuptools.build_meta"
 # configuration below.
 enable = ["all"]
 # See https://cibuildwheel.pypa.io/en/stable/options/#build-skip
-# Not sure why it was failing on PyPy 3.11.
-build = "cp38-* pp310-* cp313t-* cp314t-*"
+build = "cp38-* pp310-* pp311-* cp313t-* cp314t-*"