treewide: update homepages to https where available

Based on "problems" from repology:

https://repology.org/repository/nix_unstable/problems

Mostly simple changes to reflect redirects.

pkgs/development/interpreters/jython/default.nix

@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Python interpreter written in Java";
-    homepage = http://jython.org/;
+    homepage = https://jython.org/;
     license = stdenv.lib.licenses.psfl;
     platforms = jre.meta.platforms;
   };