runtime(vim): Add support for <ScriptCmd> syntax (#10686)

Adding `<ScriptCmd>` to list of angle-bracket notation syntax, just like `<Cmd>`

`<Cmd>` is already highlighted.
```vim
nnoremap <leader>o <Cmd>Oldfiles()<CR>
```

`<ScriptCmd>` is not.

Signed-off-by: dezza <402927+dezza@users.noreply.github.com>
Signed-off-by: Doug Kearns <dougkearns@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/syntax/vim.vim b/runtime/syntax/vim.vim
index 08414a6..d0f66d1 100644
--- a/runtime/syntax/vim.vim
+++ b/runtime/syntax/vim.vim
@@ -487,7 +487,7 @@
 " Angle-Bracket Notation: (tnx to Michael Geddes) {{{2
 " ======================
 syn case ignore
-syn match	vimNotation	"\%#=1\(\\\|<lt>\)\=<\([scamd]-\)\{0,4}x\=\(f\d\{1,2}\|[^ \t:]\|cmd\|cr\|lf\|linefeed\|retu\%[rn]\|k\=del\%[ete]\|bs\|backspace\|tab\|esc\|right\|left\|help\|undo\|insert\|ins\|mouse\|k\=home\|k\=end\|kplus\|kminus\|kdivide\|kmultiply\|kenter\|kpoint\|space\|k\=\(page\)\=\(\|down\|up\|k\d\>\)\)>" contains=vimBracket
+syn match	vimNotation	"\%#=1\(\\\|<lt>\)\=<\([scamd]-\)\{0,4}x\=\(f\d\{1,2}\|[^ \t:]\|cmd\|scriptcmd\|cr\|lf\|linefeed\|retu\%[rn]\|k\=del\%[ete]\|bs\|backspace\|tab\|esc\|right\|left\|help\|undo\|insert\|ins\|mouse\|k\=home\|k\=end\|kplus\|kminus\|kdivide\|kmultiply\|kenter\|kpoint\|space\|k\=\(page\)\=\(\|down\|up\|k\d\>\)\)>" contains=vimBracket
 syn match	vimNotation	"\%#=1\(\\\|<lt>\)\=<\([scam2-4]-\)\{0,4}\(right\|left\|middle\)\(mouse\)\=\(drag\|release\)\=>"	contains=vimBracket
 syn match	vimNotation	"\%#=1\(\\\|<lt>\)\=<\(bslash\|plug\|sid\|space\|bar\|nop\|nul\|lt\)>"			contains=vimBracket
 syn match	vimNotation	'\(\\\|<lt>\)\=<C-R>[0-9a-z"%#:.\-=]'he=e-1				contains=vimBracket