fix(tree-sitter): correct any_type highlighting in queries

Changed highlights.scm to use (any_type) node type instead of the
string literal "any". The grammar defines any as any_type rule,
not as a bare keyword string.

tree-sitter-storybook/queries/highlights.scm

@@ -48,9 +48,11 @@
   "remove"
   "append"
   "is"
-  "any"
 ] @keyword.special
 
+; any type keyword
+(any_type) @keyword.special
+
 ; Boolean literals
 [
   "true"