annotationlib docs: note that ForwardRef.evaluate eventually defaults to empty globals (#134661)

Doc/library/annotationlib.rst

diff --git a/Doc/library/annotationlib.rst b/Doc/library/annotationlib.rst
index 41c9ce4..7dfc114 100644
--- a/Doc/library/annotationlib.rst
+++ b/Doc/library/annotationlib.rst
@@ -211,6 +211,10 @@
       means may not have any information about their scope, so passing
       arguments to this method may be necessary to evaluate them successfully.
 
+      If no *owner*, *globals*, *locals*, or *type_params* are provided and the
+      :class:`~ForwardRef` does not contain information about its origin,
+      empty globals and locals dictionaries are used.
+
    .. versionadded:: 3.14