Add a note about truncate bug resolution (#3098)

Resolves #2599 

Thanks to Alexander Turenko for suggesting to add this improvement.

Author: patiencedaur

doc/reference/reference_lua/box_space/truncate.rst

@@ -24,7 +24,10 @@ space_object:truncate()
         Read more about `setuid` functions in the reference for
         :doc:`/reference/reference_lua/box_schema/func_create`.
 
-        The ``truncate`` method cannot be called from within a transaction.
+        ..  note::
+
+            Do not call this method within a transaction in
+            Tarantool older than :tarantool-release:`2.10.0`. See :tarantool-issue:`6123` for details.
 
         **Example:**
 

locale/ru/LC_MESSAGES/reference/reference_lua/box_space/truncate.po

@@ -39,8 +39,10 @@ msgstr ""
 "`setuid` можно получить в справочнике по for "
 ":doc:`/reference/reference_lua/box_schema/func_create`."
 
-msgid "The ``truncate`` method cannot be called from within a transaction."
-msgstr "Метод ``truncate`` нельзя вызвать из транзакции."
+msgid "Do not call this method within a transaction in "
+"Tarantool older than :tarantool-release:`2.10.0`. See :tarantool-issue:`6123` for details."
+msgstr "В версиях Tarantool старше :tarantool-release:`2.10.0` "
+"не следует вызывать ``truncate`` из транзакции. Подробности в тикете :tarantool-issue:`6123`."
 
 msgid "**Example:**"
 msgstr "**Пример:**"