chore: update CHANGELOG for v0.38.dev0 (#4667)

Update CHANGELOG for v0.38.dev0 and remove .md files in doc/changelog.d.

> [!CAUTION]
> Do not merge this pull request until the release has been successfully
made.

---------

Co-authored-by: Mainak Kundu <94432368+mkundu1@users.noreply.github.com>

Author: pyansys-ci-bot

doc/changelog.d/4629.maintenance.md

@@ -0,0 +1 @@
+Update CHANGELOG for v0.38.dev0

doc/changelog.d/4636.maintenance.md

@@ -9,8 +9,72 @@ This document contains the release notes for the project.
 
 .. towncrier release notes start
 
+`0.38.dev0 <https://github.com/ansys/pyfluent/releases/tag/v0.38.dev0>`_ - November 27, 2025
+
+.. tab-set::
+
+
+  .. tab-item:: Added
+
+    .. list-table::
+        :header-rows: 0
+        :widths: auto
+
+        * - Secure gRPC options
+          - `#24 <https://github.com/ansys/pyfluent/pull/24>`_
+
+
+  .. tab-item:: Fixed
+
+    .. list-table::
+        :header-rows: 0
+        :widths: auto
+
+        * - Support insecure mode while launching container
+          - `#14 <https://github.com/ansys/pyfluent/pull/14>`_
+
+        * - Fix test_strings_with_allowed_values
+          - `#4646 <https://github.com/ansys/pyfluent/pull/4646>`_
+
+
+  .. tab-item:: Dependencies
+
+    .. list-table::
+        :header-rows: 0
+        :widths: auto
+
+        * - Bump version 0.35.1
+          - `#16 <https://github.com/ansys/pyfluent/pull/16>`_
+
+        * - Fix nightly dev docs.
+          - `#4641 <https://github.com/ansys/pyfluent/pull/4641>`_
+
+
+  .. tab-item:: Maintenance
+
+    .. list-table::
+        :header-rows: 0
+        :widths: auto
+
+        * - Update launcher tests for better coverage
+          - `#4629 <https://github.com/ansys/pyfluent/pull/4629>`_
+
+        * - Update CHANGELOG for v0.37.dev0
+          - `#4636 <https://github.com/ansys/pyfluent/pull/4636>`_
+
+        * - Update CHANGELOG for v0.36.0
+          - `#4638 <https://github.com/ansys/pyfluent/pull/4638>`_
+
+        * - Update failing test for settings-api allowed_values.
+          - `#4639 <https://github.com/ansys/pyfluent/pull/4639>`_
+
+        * - Fix nightly
+          - `#4661 <https://github.com/ansys/pyfluent/pull/4661>`_
+
+
+`0.37.dev0 <https://github.com/ansys/pyfluent/releases/tag/v0.37.dev0>`_ - November 24, 2025
+`0.36.0 <https://github.com/ansys/pyfluent/releases/tag/v0.36.0>`_ - November 25, 2025
 `0.37.0 <https://github.com/ansys/pyfluent/releases/tag/v0.37.0>`_ - November 26, 2025
-======================================================================================
 
 .. tab-set::