Drop the upper bound on the requests dependency again

As we can now work with requests 2.32.3+, we no longer need this
pin.

Signed-off-by: Adam Williamson <[email protected]>

setup.cfg

@@ -50,7 +50,7 @@ install_requires =
     pip
     charset_normalizer>=2.0.0
     defusedxml>=0.6.0
-    requests[socks] >=2.22.0, <=2.31.0
+    requests[socks] >=2.22.0
     Pygments>=2.5.2
     requests-toolbelt>=0.9.1
     multidict>=4.7.0