Fix docker cp command to copy directory contents instead of creating subdirectory

- Changed 'docker cp CONTAINER_ID:/workspace/ .' to 'docker cp CONTAINER_ID:/workspace/. .'
- The trailing '.' copies the contents of /workspace/ directly to current directory
- This prevents creating a workspace/ subdirectory that breaks the upload step
- Should fix the issue where .deb files were in wrong location

.forgejo/workflows/ci.yml

@@ -226,7 +226,7 @@ jobs:
           echo "Contents of container /workspace before copy:"
           docker exec $CONTAINER_ID ls -la /workspace/ 2>/dev/null || echo "Cannot exec into container"
           
-          docker cp $CONTAINER_ID:/workspace/ .
+          docker cp $CONTAINER_ID:/workspace/. .
           
           echo "Contents of host directory after copy:"
           ls -la