chore: run merge tests in python 3.11 too

Signed-off-by: Federico Bond <federicobond@gmail.com>

Author: federicobond

.github/workflows/merge.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        container: ["python:3.8", "python:3.9", "python:3.10"]
+        container: ["python:3.8", "python:3.9", "python:3.10", "python:3.11"]
     container:
       image: ${{ matrix.container }}