fix(ext): Update default Neovide argument to --no-fork

Prevents crash on startup.

[1] neovide/neovide@5743356#diff-4583b895d17596f30dcbac33a7d47de9c210df2c07210bb0775b7c27097345daR55
[2] https://neovide.dev/command-line-reference.html#no-fork

extension/options/options.js

@@ -9,7 +9,7 @@ const editors = {
   'vim': new Editor('vim', false),
   'emacs': new Editor('emacs', true),
   'kak': new Editor('kak', false),
-  'neovide': new Editor('neovide --nofork', true),
+  'neovide': new Editor('neovide --no-fork', true),
   'gvim': new Editor('gvim --nofork', true),
 }
 const homebrewDefaultDir = '/usr/local/bin/'