🔧 Fix PyPy 3.8 pipeline

dev-requirements.txt

@@ -5,10 +5,8 @@ python-socks==2.4.4
 pytest>=7.4.4,<9
 pytest-timeout>=2.3.1,<3
 trustme>=0.9.0,<2
-# We have to install at most cryptography 39.0.2 for PyPy<7.3.10
-# versions of Python 3.7, 3.8, and 3.9.
-cryptography==39.0.2; implementation_name=="pypy" and implementation_version<="7.3.11"
-cryptography==42.0.5; implementation_name!="pypy" or implementation_version>"7.3.11"
+cryptography<40.0.0; python_version <= '3.8'
+cryptography<44; python_version > '3.8'
 backports.zoneinfo==0.2.1; python_version<"3.9"
 tzdata==2024.2; python_version<"3.8"
 towncrier==21.9.0