syntax-highlighting: vim: fix mesonSpaceError

Fixes regression from 388fa6e776

Found by https://www.check-spelling.dev/

Signed-off-by: Josh Soref <2119212+jsoref@users.noreply.github.com>

data/syntax-highlighting/vim/syntax/meson.vim

@@ -150,7 +150,7 @@ hi def link mesonEscape		Special
 hi def link mesonNumber		Number
 hi def link mesonBuiltin	Function
 hi def link mesonBoolean	Boolean
-if exists("meson_space_error_higlight")
+if exists("meson_space_error_highlight")
   hi def link mesonSpaceError	Error
 endif