test: switch to pypy3.11-nightly

Also, Windows builds seem to lag farther behind.  I'm tired of getting
failure emails every day about the nightly tests failing because the
builds are old.

Author: nedbat

.github/workflows/python-nightly.yml

@@ -63,18 +63,18 @@ jobs:
           - "3.13"
           - "3.14"
           # https://github.com/actions/setup-python#available-versions-of-pypy
-          - "pypy-3.10"
+          - "pypy-3.11"
         nogil:
           - false
           - true
-        include:
-          - python-version: "pypy-3.10"
-            os: "windows-latest"
-            os-short: "windows"
+        # include:
+        #   - python-version: "pypy-3.11"
+        #     os: "windows-latest"
+        #     os-short: "windows"
         exclude:
           - python-version: "3.12"
             nogil: true
-          - python-version: "pypy-3.10"
+          - python-version: "pypy-3.11"
             nogil: true
 
       fail-fast: false

tox.ini

@@ -136,4 +136,4 @@ python =
     3.14 = py314
     3.14t = py314t
     pypy-3 = pypy3
-    pypy-3.10 = pypy3
+    pypy-3.11 = pypy3