Exclude pypy3.11 on windows-2025 from CI matrix

PyPy3 on Windows has never been an explicitly supported configuration.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: h-g-s

.github/workflows/github-ci.yml

@@ -41,6 +41,9 @@ jobs:
       matrix:
         python-version: ["3.10", "3.11", "3.12", "3.13", "pypy3.11"]
         os: [macos-15, ubuntu-24.04, ubuntu-24.04-arm, windows-2025]
+        exclude:
+          - python-version: "pypy3.11"
+            os: windows-2025
 
     steps: