ci: Fix job dependencies

The `nox` job makes `publish-docs` depend on every `nox` job matrix
entry, while the `nox-all` is a join point for them. Depending on both
has the same effect, but the dependency graph looks nicer if we depend
on `nox-all` instead.

Signed-off-by: Leandro Lucarella <[email protected]>

Author: llucax

.github/workflows/ci.yaml

@@ -301,7 +301,7 @@ jobs:
 
   publish-docs:
     name: Publish documentation website to GitHub pages
-    needs: ["nox", "nox-cross-arch-all", "test-installation"]
+    needs: ["nox-all", "nox-cross-arch-all", "test-installation"]
     if: github.event_name == 'push'
     runs-on: ubuntu-20.04
     permissions: