use https://github.com for all homepages

GitHub does a redirect to https:// when you use http://

repology complains with:

“Homepage link "https://github.com/…" is dead (HTTP error 404) for more than a month.”

This will fix some of them (not all though)

pkgs/applications/window-managers/sxhkd/default.nix

@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Simple X hotkey daemon";
-    homepage = http://github.com/baskerville/sxhkd/;
+    homepage = https://github.com/baskerville/sxhkd/;
     license = stdenv.lib.licenses.bsd2;
     platforms = stdenv.lib.platforms.linux;
   };