Fix PyPI publish workflow: update pinned publish action

The publish step was pinned to a 2021 revision of
pypa/gh-action-pypi-publish, whose bundled twine rejects the
`Metadata-Version: 2.5` that current hatchling emits:

    InvalidDistribution: Invalid distribution metadata:
    '2.5' is not a valid metadata version

This made the v0.2.3 release fail to publish. Pin the action to v1.14.2
and refresh checkout/setup-python to versions that still run on a
supported Node runtime.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: Juan Pablo Manson

.github/workflows/python-publish.yml

@@ -21,9 +21,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@v5
       with:
         python-version: '3.x'
     - name: Install dependencies
@@ -33,7 +33,7 @@ jobs:
     - name: Build package
       run: python -m build
     - name: Publish package
-      uses: pypa/gh-action-pypi-publish@27b31702a0e7fc50959f5ad993c78deac1bdfc29
+      uses: pypa/gh-action-pypi-publish@dc37677b2e1c63e2034f94d8a5b11f265b73ba33 # v1.14.2
       with:
         user: __token__
         password: ${{ secrets.PYPI_API_TOKEN }}