3.1 release notes (#4158)

Author: andreyaksenov

doc/release/3.0.0.rst

@@ -3,7 +3,7 @@ Tarantool 3.0
 
 Release date: December 26, 2023
 
-Releases on GitHub: :tarantool-release:`3.0.1`, :tarantool-release:`3.0.0`
+Releases on GitHub: :tarantool-release:`3.0.2`, :tarantool-release:`3.0.1`, :tarantool-release:`3.0.0`
 
 The 3.0 release of Tarantool introduces a new declarative approach for configuring a cluster,
 a new visual tool -- Tarantool Cluster Manager,

doc/release/3.1.0.rst

@@ -1,9 +1,9 @@
 Tarantool 3.1
 =============
 
-Planned release date: April 2024
+Release date: April 16, 2024
 
-Releases on GitHub: not released yet
+Releases on GitHub: :tarantool-release:`3.1.0`
 
 The 3.1 release of Tarantool continues the development of a new cluster configuration approach introduced in the :ref:`3.0 version <3-0-new_declarative_configuration>` and adds the following main product features and improvements for the Community and Enterprise editions:
 

doc/release/_images/releases_calendar.svg

@@ -61,11 +61,18 @@ For information about earlier versions, see :doc:`eol_versions`.
             -   End of support
             -   Versions
 
+        *   -   :doc:`3.1 </release/3.1.0>`
+            -   **April 16, 2024**
+            -   **April 16, 2026**
+            -   **Not planned yet**
+            -   | :tarantool-release:`3.1.0`
+
         *   -   :doc:`3.0 </release/3.0.0>`
             -   **December 26, 2023**
             -   **December 26, 2025**
             -   **Not planned yet**
-            -   | :tarantool-release:`3.0.1`
+            -   | :tarantool-release:`3.0.2`
+                | :tarantool-release:`3.0.1`
                 | :tarantool-release:`3.0.0`
 
         *   -   :doc:`2.11 LTS </release/2.11.0>`