Clarify usage of @deprecated annotation in stubs

To indicate that this was used prior to the \Deprecated attribute being usable on those symbols.

Author: Girgias

docs/source/miscellaneous/stubs.rst

@@ -224,6 +224,7 @@ The generated ``class_Atmosphere_methods`` must be used when registering the ``A
 Additional meta information can be attached to functions, with the following PHPDoc tags:
 
 -  ``@deprecated``: Triggers the usual deprecation notice when the function/method is called.
+   As of PHP 8.4.0 the `#[\Deprecated]` attribute should be used instead.
 
 -  ``@alias``: If a function/method is an alias of another function/method, then the aliased
    function/method name has to be provided as value. E.g. the function ``sizeof()`` has the ``@alias
@@ -453,6 +454,7 @@ with ``@cvalue M_PI`` to the C-level constant ``M_PI`` (define by PHP's internal
 Constants can take the following extra meta information passed via PHPDoc tags:
 
 -  ``@deprecated``: Triggers a deprecation notice when the constant is used.
+   As of PHP 8.5.0 the `#[\Deprecated]` attribute should be used instead.
 
 -  ``@genstubs-expose-comment-block``: By adding this tag at the beginning of a PHPDoc block, the
    content of the PHPDoc block will be exposed for `ReflectionClass::getDocComment()`. This feature