bpo-38605: Update __future__ module doc as `annotations` is now "mandatory in 3.11" (GH-25602)



diff --git a/Doc/library/__future__.rst b/Doc/library/__future__.rst
index 4139994..24bbd90 100644
--- a/Doc/library/__future__.rst
+++ b/Doc/library/__future__.rst
@@ -90,7 +90,7 @@
 | generator_stop   | 3.5.0b1     | 3.7          | :pep:`479`:                                 |
 |                  |             |              | *StopIteration handling inside generators*  |
 +------------------+-------------+--------------+---------------------------------------------+
-| annotations      | 3.7.0b1     | 3.10         | :pep:`563`:                                 |
+| annotations      | 3.7.0b1     | 3.11         | :pep:`563`:                                 |
 |                  |             |              | *Postponed evaluation of annotations*       |
 +------------------+-------------+--------------+---------------------------------------------+