[NFC] [Doc] Fix example for AnnotateTypeDocs

[python3kgae]

Summary

Change clang::annotate into clang::annotate_type.

The example will get error like
error: 'annotate' attribute cannot be applied to types
int* [[clang::annotate("category1", "foo", 1)]] f(int[[clang::annotate("category2")]] *);

[python3kgae]

Merry Christmas and ping

[python3kgae]

Happy new year and ping

[erichkeane]

I don't particularly know what the intent here was, so I'm hoping that @mboehme will review when he gets back from whatever vacation he's taking.

[aaron.ballman]

LGTM, thank you!

[mboehme]

Sorry for the delay.

Just to confirm, yes this should of course be annotate_type. Thanks for catching my mistake.

@aaron.ballman Thanks for reviewing!

clang/include/clang/Basic/AttrDocs.td

 annotation category and an arbitrary number of optional arguments that provide
 additional information specific to the annotation category. The optional
 arguments must be constant expressions of arbitrary type.
 
 For example:
 
 .. code-block:: c++
 
-  int* [[clang::annotate("category1", "foo", 1)]] f(int[[clang::annotate("category2")]] *);
+  int* [[clang::annotate_type("category1", "foo", 1)]] f(int[[clang::annotate_type("category2")]] *);
 
 The attribute does not have any effect on the semantics of the type system,
 neither type checking rules, nor runtime semantics. In particular:
 
 - ``std::is_same<T, T [[clang::annotate_type("foo")]]>`` is true for all types
   ``T``.
 
 - It is not permissible for overloaded functions or template specializations