Don't create nox sessions twice in cross-arch tests

Signed-off-by: Leandro Lucarella <luca-frequenz@llucax.com>

.github/workflows/ci.yaml

@@ -180,7 +180,7 @@ jobs:
             --net=host \
             --platform linux/${{ matrix.arch }} \
             localhost/nox-cross-arch:latest \
-            bash -c "pip install -e .[dev-noxfile]; nox --install-only -e ${{ matrix.nox-session }}; pip freeze; nox -e ${{ matrix.nox-session }}"
+            bash -c "pip install -e .[dev-noxfile]; nox --install-only -e ${{ matrix.nox-session }}; pip freeze; nox -R -e ${{ matrix.nox-session }}"
         timeout-minutes: 30
 
       # This ensures that the runner has access to the pip cache.