build-and-test-prod-image with new backend directory structure

.github/workflows/build.yml

@@ -37,7 +37,7 @@ jobs:
           path: "./openslides-client"
 
       - name: Use example data instead of initial data
-        working-directory: "./openslides-backend/global/data/"
+        working-directory: "./openslides-backend/data/"
         run: cp example-data.json initial-data.json
 
       - name: Start setup