Merge pull request #191383 from lilyritt/master

discord: 0.0.19 -> 0.0.20

pkgs/applications/networking/instant-messengers/discord/default.nix

···
 { branch ? "stable", callPackage, fetchurl, lib, stdenv }:
 let
   versions = if stdenv.isLinux then {
-    stable = "0.0.19";
+    stable = "0.0.20";
     ptb = "0.0.29";
     canary = "0.0.139";
   } else {
···
     x86_64-linux = {
       stable = fetchurl {
         url = "https://dl.discordapp.net/apps/linux/${version}/discord-${version}.tar.gz";
-        sha256 = "GfSyddbGF8WA6JmHo4tUM27cyHV5kRAyrEiZe1jbA5A=";
+        sha256 = "3f7yuxigEF3e8qhCetCHKBtV4XUHsx/iYiaCCXjspYw=";
       };
       ptb = fetchurl {
         url = "https://dl-ptb.discordapp.net/apps/linux/${version}/discord-ptb-${version}.tar.gz";