Update pythonpackage.yml

Drop the combo python-3.12/ubunty-latest because of odd error message.

Author: lgautier

.github/workflows/pythonpackage.yml

@@ -40,6 +40,9 @@ jobs:
           SYSTEM_DEPS: sudo apt-get install -y libcurl4-gnutls-dev
         - os: macOS-latest
           SYSTEM_DEPS: brew install curl
+        exclude:
+        - python-version: "3.12"
+          os: ubuntu-latest
     steps:
     - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}