Sync queries with nvim-treesitter

`nvim-treesitter` has a few updates that it would make sense to bring in:
* Using `@function.call` rather than just `@function`: should fall back
to the more-generic highlight anywhere the specific one isn't supported
* Adding `@spell`: harmless if that isn't recognized

We do retain the one difference around `#match` vs `#lua-match`, since
that was a PR made directly as a divergence.

queries/highlights.scm

@@ -59,10 +59,10 @@
 (enum_entry ["case" @keyword])
 
 ; Function calls
-(call_expression (simple_identifier) @function) ; foo()
+(call_expression (simple_identifier) @function.call) ; foo()
 (call_expression ; foo.bar.baz(): highlight the baz()
   (navigation_expression
-    (navigation_suffix (simple_identifier) @function)))
+    (navigation_suffix (simple_identifier) @function.call)))
 ((navigation_expression
    (simple_identifier) @type) ; SomeType.method(): highlight SomeType as a type
    (#match? @type "^[A-Z]"))
@@ -96,8 +96,10 @@
 (statement_label) @label
 
 ; Comments
-(comment) @comment
-(multiline_comment) @comment
+[
+ (comment)
+ (multiline_comment)
+] @comment @spell
 
 ; String literals
 (line_str_text) @string