Try allowing PY311 to fail pending redis-py release.

redis/redis-py#2659

Author: carltongibson

.github/workflows/tests.yml

@@ -9,6 +9,7 @@ on:
 jobs:
   tests:
     name: Python ${{ matrix.python-version }}
+    continue-on-error: ${{ matrix.python-version == '3.11' }}
     runs-on: ubuntu-latest
     timeout-minutes: 10
     strategy: