vim-patch:9.0.1409: racket files are recognized as scheme

Problem:    Racket files are recognized as scheme.
Solution:   Recognize rackets files separately. (Gabriel Kakizaki,
            closes vim/vim#12164, closes vim/vim#12162)

d11ac403db

Co-authored-by: Gabriel Kakizaki <gkakizaki@gmail.com>

runtime/lua/vim/filetype.lua

@@ -838,6 +838,9 @@ local extension = {
   R = function(path, bufnr)
     return require('vim.filetype.detect').r(bufnr)
   end,
+  rkt = 'racket',
+  rktd = 'racket',
+  rktl = 'racket',
   rad = 'radiance',
   mat = 'radiance',
   ['pod6'] = 'raku',
@@ -910,9 +913,6 @@ local extension = {
   ss = 'scheme',
   scm = 'scheme',
   sld = 'scheme',
-  rkt = 'scheme',
-  rktd = 'scheme',
-  rktl = 'scheme',
   sce = 'scilab',
   sci = 'scilab',
   scss = 'scss',