python3Packages.matrix-nio: relax dependency aiohttp-socks

matrix-nio specifies aiohttp-socks@^0.8.4 but nixpkgs provides 0.9.0.
The changes introduced in 0.9.0 are internal and compatible with
matrix-nio, so nixpkgs may simply relax the version specification.
matrix-nio/matrix-nio#516 proposes to do the same upstream.

pkgs/development/python-modules/matrix-nio/default.nix

@@ -65,6 +65,10 @@ buildPythonPackage rec {
     unpaddedbase64
   ];
 
+  pythonRelaxDeps = [
+    "aiohttp-socks" # Pending matrix-nio/matrix-nio#516
+  ];
+
   passthru.optional-dependencies = {
     e2e = [
       atomicwrites