patch 8.2.2790: filetype test fails

Problem:    filetype test fails
Solution:   Also update the scripts detection
diff --git a/runtime/scripts.vim b/runtime/scripts.vim
index cae5485..0b3fdc3 100644
--- a/runtime/scripts.vim
+++ b/runtime/scripts.vim
@@ -110,10 +110,6 @@
   elseif s:name =~# 'lua'
     set ft=lua
 
-    " Perl 6
-  elseif s:name =~# 'perl6'
-    set ft=perl6
-
     " Perl
   elseif s:name =~# 'perl'
     set ft=perl
@@ -130,6 +126,10 @@
   elseif s:name =~# '^groovy\>'
     set ft=groovy
 
+    " Raku
+  elseif s:name =~# 'raku'
+    set ft=raku
+
     " Ruby
   elseif s:name =~# 'ruby'
     set ft=ruby