workflows/sync_release-manifest: checkout backstage into backstage

Co-authored-by: blam <ben@blam.sh>
Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

.github/workflows/sync_release-manifest.yml

@@ -20,14 +20,15 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v2
         with:
+          path: backstage
           ref: ${{ github.event.inputs.version }}
 
-      # Checkout backstage/versions into /versions, which is where store the output
+      # Checkout backstage/versions into /backstage/versions, which is where store the output
       - name: Checkout versions
         uses: actions/checkout@v2
         with:
           repository: backstage/versions
-          path: versions
+          path: backstage/versions
           token: ${{ secrets.GH_SERVICE_ACCOUNT_TOKEN }}
 
       - name: Configure Git
@@ -38,6 +39,7 @@ jobs:
       - name: Create release
         # This grabs the scripts from master in order to support backfills
         run: |
+          cd backstage
           mkdir -p scripts
           wget -O scripts/assemble-manifest.js https://raw.githubusercontent.com/backstage/backstage/master/scripts/assemble-manifest.js
           node scripts/assemble-manifest.js ${{ github.event.inputs.version }}