doc: add 1.5.1 release note

Author: mar

doc/tooling/tcm/tcm_releases/tcm_1.5.rst

@@ -54,3 +54,16 @@ This release includes multiple fixes across different modules:
 - UI -- resolved display issues in the ``OperationStatus`` component.
 - Tuples -- fixed an error that caused tab refresh failures in clusters with a large number of spaces.
 
+.. _tcm_releases_1_5_1:
+
+Migrations section
+------------------
+
+Since version 1.5.1, |tcm| includes a new ``migrations`` section with a ``duration`` field.
+This field allows specifying the maximum execution time for long-running migrations, preventing them from being interrupted by the default timeout.
+
+Fixes
+------
+
+- ``utils`` — the`` FilterSlices`` function to correctly filter slices.
+- :ref:`Audit log <tcm_audit_log>` documentation contained unnecessary event types.