Update release policy information on Godot 4.3 (#9755)

* Update release_policy.rst

Co-authored-by: A Thousand Ships <[email protected]>

about/release_policy.rst

@@ -82,9 +82,12 @@ on GitHub.
 +--------------+----------------------+--------------------------------------------------------------------------+
 | **Version**  | **Release date**     | **Support level**                                                        |
 +--------------+----------------------+--------------------------------------------------------------------------+
-| Godot 4.3    | June 2024            | |unstable| *Development.* Receives new features, usability and           |
+| Godot 4.4    | To be announced      | |unstable| *Development.* Receives new features, usability and           |
 | (`master`)   | (estimate)           | performance improvements, as well as bug fixes, while under development. |
 +--------------+----------------------+--------------------------------------------------------------------------+
+| Godot 4.3    | August 2024          | |supported| Receives fixes for bugs and security issues, as well as      |
+|              |                      | patches that enable platform support.                                    |
++--------------+----------------------+--------------------------------------------------------------------------+
 | Godot 4.2    | November 2023        | |supported| Receives fixes for bugs and security issues, as well as      |
 |              |                      | patches that enable platform support.                                    |
 +--------------+----------------------+--------------------------------------------------------------------------+