chore: updating CHANGELOG for v0.1.1

Author: pyansys-ci-bot

doc/source/changelog.rst

@@ -9,4 +9,20 @@ This document contains the release notes for the PySTK project.
 
 .. towncrier release notes start
 
+`0.1.1 <https://github.com/ansys/pystk/releases/tag/v0.1.1>`_ - August 06, 2025
+===============================================================================
+
+.. tab-set::
+
+
+  .. tab-item:: Added
+
+    .. list-table::
+        :header-rows: 0
+        :widths: auto
+
+        * - First release of PySTK
+          - `#784 <https://github.com/ansys/pystk/pull/784>`_
+
+
 .. vale on