ci: Test on PyPy 3.11 instead of 3.10

* https://pypy.org/download
* https://pypy.org/blog

Author: cclauss

.github/workflows/ci.yml

@@ -27,7 +27,7 @@ jobs:
           - "3.11"
           - "3.12"
           - "3.13"
-          - "pypy-3.10"
+          - "pypy-3.11"
     steps:
       - name: Checkout
         uses: actions/checkout@v5