Treewide: update some problematic homepages

These URLs are reported as problematic by Repology.
It could be a permanent redirection
or the page does not exist anymore

pkgs/development/python-modules/aioeventlet/default.nix

@@ -28,7 +28,7 @@ buildPythonPackage rec {
 
   meta = with stdenv.lib; {
     description = "aioeventlet implements the asyncio API (PEP 3156) on top of eventlet. It makes";
-    homepage = https://aioeventlet.readthedocs.org/;
+    homepage = "https://pypi.org/project/aioeventlet/";
     license = licenses.asl20;
   };