element-desktop: apply patch to run on Wayland (#137666)

See upstream PR#261[1] for further reference. Previously, the
`enable-features`-setting was entirely discarded due to an earlier
regression resulting in an attempt to start `element-desktop` in
Wayland-mode without all necessary components.

Closes #137377

[1] https://github.com/vector-im/element-desktop/pull/261

pkgs/applications/networking/instant-messengers/element/element-desktop.nix

···
 , electron
 , element-web
 , callPackage
+, fetchpatch
+
 , Security
 , AppKit
 , CoreServices
···
 mkYarnPackage rec {
   name = "element-desktop-${version}";
   inherit version src;
+
+  patches = [
+    (fetchpatch {
+      url = "https://github.com/vector-im/element-desktop/commit/96e5389779f60c91b8fe80d7bd9af413d72ec61f.patch";
+      sha256 = "sha256-82I5BDNDWIfp+m2HpzTA5+39hMv2bTbmJlXfM4YUjDY=";
+    })
+  ];
 
   packageJSON = ./element-desktop-package.json;
   yarnNix = ./element-desktop-yarndeps.nix;