Add Tarantool 2.11.6 release (latest branch) (#5029)

Fixes #5028

Author: xuniq

doc/release/2.11.0.rst

@@ -3,7 +3,7 @@ Tarantool 2.11 (LTS)
 
 Release date: May 24, 2023
 
-Releases on GitHub: :tarantool-release:`2.11.5`, :tarantool-release:`2.11.4`, :tarantool-release:`2.11.3`, :tarantool-release:`2.11.2`, :tarantool-release:`2.11.1`, :tarantool-release:`2.11.0`
+Releases on GitHub: :tarantool-release:`2.11.6`, :tarantool-release:`2.11.5`, :tarantool-release:`2.11.4`, :tarantool-release:`2.11.3`, :tarantool-release:`2.11.2`, :tarantool-release:`2.11.1`, :tarantool-release:`2.11.0`
 
 The 2.11 release of Tarantool includes many new features and fixes.
 This document provides an overview of the most important features for the Enterprise and Community editions.

doc/release/_images/releases_calendar.svg

@@ -68,7 +68,6 @@ For information about earlier versions, see :doc:`eol_versions`.
             -   | :tarantool-release:`3.3.1`
                 | :tarantool-release:`3.3.0`
 
-
         *   -   :doc:`3.2 </release/3.2.0>`
             -   **August 26, 2024**
             -   **August 26, 2026**
@@ -96,7 +95,8 @@ For information about earlier versions, see :doc:`eol_versions`.
             -   **May 24, 2023**
             -   **May 24, 2025**
             -   **Not planned yet**
-            -   | :tarantool-release:`2.11.5`
+            -   | :tarantool-release:`2.11.6`
+                | :tarantool-release:`2.11.5`
                 | :tarantool-release:`2.11.4`
                 | :tarantool-release:`2.11.3`
                 | :tarantool-release:`2.11.2`