Set cross-arch-ci timeout to 8 minutes (#110)

Author: Marenz

.github/workflows/ci.yaml

@@ -185,7 +185,7 @@ jobs:
             --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 -R -e ${{ matrix.nox-session }}"
-        timeout-minutes: 6
+        timeout-minutes: 8
 
       # This ensures that the runner has access to the pip cache.
       - name: Reset pip cache ownership