Terminology change: monorepo -> super-repo

.github/workflows/merge-submodules.yml

@@ -7,7 +7,7 @@ jobs:
   combine-gitmodules:
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout Monorepo
+      - name: Checkout super-repo
         uses: actions/checkout@v4
 
       - name: Set up Python