Merge pull request #2080 from minrk/263

 release 26.3 with pypy 3.11 wheels

Author: minrk

.github/workflows/test-docs.yml

@@ -26,13 +26,13 @@ env:
 
 jobs:
   test-docs:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v4
 
       - uses: actions/setup-python@v5
         with:
-          python-version: "3.11"
+          python-version: "3.12"
           cache: pip
 
       - name: Install libzmq

docs/source/changelog.md

@@ -11,6 +11,14 @@ For a full changelog, consult the [git log](https://github.com/zeromq/pyzmq/comm
 
 pyzmq 26.3 drops support for Python 3.7 and adds wheels for PyPy 3.11
 
+The cffi backend can now be built on CPython by setting `PYZMQ_BACKEND=cffi`, e.g.
+
+```
+PYZMQ_BACKEND=cffi pip install --no-binary pyzmq cffi pyzmq
+```
+
+This is not fully supported, but can be used for testing.
+
 ### 26.2.1
 
 26.2.1 is a tiny bugfix release