Architecture roadmap (#15)

* switch to architecture-roadmap branch in openadstack

* remove second update step

Author: RaphvK

.github/workflows/sphinx.yml

@@ -11,7 +11,7 @@ on:
       openadstack_ref:
         description: 'openadstack branch to check out for its submodule (blank = the branch tracked in .gitmodules)'
         type: string
-        default: ''
+        default: 'architecture-roadmap'
       openadsim_ref:
         description: 'openadsim branch to check out for its submodule (blank = the branch tracked in .gitmodules)'
         type: string
@@ -66,14 +66,6 @@ jobs:
           fi
           git submodule update --init --recursive
 
-      - name: Ensure submodules are up to date
-        run: |
-          # Advance the top-level submodules to the tip of their tracked branches (set in .gitmodules) so the
-          # docs are built against current openadstack/openadsim content.
-          git submodule update --remote
-          # Re-check out openadsim's nested submodule at the commit pinned by its now-updated tree.
-          git -C docs/openadsim/openadsim submodule update --init --recursive
-
       - name: Inject calculated disk sizes into docs
         run: |
           bash -c "export COMPOSE_PROFILES=demo-basic && docs/assets/inject_disk_sizes.sh docs/openadstack/openadstack/demo/docker-compose.yml docs/start/start.md DISK_SIZE_OPENADSTACK"