fix ci publish workflow

Author: FreddyFox892

.github/workflows/python-publish.yml

@@ -35,7 +35,11 @@ jobs:
 
    build-n-publish:
      name: Build and publish Python 🐍 distributions 📦 to PyPI and TestPyPI
-     runs-on: ubuntu-latest
+     runs-on: ${{ matrix.os }}
+     strategy:
+       matrix:
+         python-version: [ "3.12" ]
+         os: [ ubuntu-latest ]
      # Specifying a GitHub environment, # Specifying a GitHub environment, which is strongly recommended by PyPI: https://docs.pypi.org/trusted-publishers/adding-a-publisher/
      # you have to create an environment in your repository settings and add the environment name here
      environment: release
@@ -45,7 +49,7 @@ jobs:
      needs: tests
      steps:
        - uses: actions/checkout@v4
-       - name: Set up Python
+       - name: Set up Python ${{ matrix.python-version }}
          uses: actions/setup-python@v5
          with:
            python-version: ${{ matrix.python-version }}