docs(pathfinder): prepare 1.5.3 release notes

Add the 1.5.3 pathfinder release notes and version-switcher entry so the docs site can publish the new patch release cleanly.

Made-with: Cursor

Author: rwgk

cuda_pathfinder/docs/nv-versions.json

@@ -3,6 +3,10 @@
         "version": "latest",
         "url": "https://nvidia.github.io/cuda-python/cuda-pathfinder/latest/"
     },
+    {
+        "version": "1.5.3",
+        "url": "https://nvidia.github.io/cuda-python/cuda-pathfinder/1.5.3/"
+    },
     {
         "version": "1.5.2",
         "url": "https://nvidia.github.io/cuda-python/cuda-pathfinder/1.5.2/"

cuda_pathfinder/docs/source/release/1.5.3-notes.rst

@@ -0,0 +1,14 @@
+.. SPDX-FileCopyrightText: Copyright (c) 2025-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+.. SPDX-License-Identifier: Apache-2.0
+
+.. py:currentmodule:: cuda.pathfinder
+
+``cuda-pathfinder`` 1.5.3 Release notes
+=======================================
+
+Highlights
+----------
+
+* Add support for the Windows CTK 13.2.1 CUPTI DLL name
+  ``cupti64_2026.1.1.dll`` so ``load_nvidia_dynamic_lib("cupti")`` can
+  recognize the installed library on CTK 13.2.1 systems.