patch 8.2.2790: filetype test fails

Problem:    filetype test fails
Solution:   Also update the scripts detection

runtime/scripts.vim

@@ -110,10 +110,6 @@ if s:line1 =~# "^#!"
   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 @@ if s:line1 =~# "^#!"
   elseif s:name =~# '^groovy\>'
     set ft=groovy
 
+    " Raku
+  elseif s:name =~# 'raku'
+    set ft=raku
+
     " Ruby
   elseif s:name =~# 'ruby'
     set ft=ruby

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2790,
 /**/
     2789,
 /**/