[BUG]Fix non-type template parameter to cugraph::relabel (#4064)

Fix non-type template parameter to `cugraph::relabel`

Authors:
  - Naim (https://github.com/naimnv)

Approvers:
  - Seunghwa Kang (https://github.com/seunghwak)
  - Chuck Hastings (https://github.com/ChuckHastings)

URL: #4064

cpp/src/community/flatten_dendrogram.hpp

@@ -75,7 +75,7 @@ void leiden_partition_at_level(raft::handle_t const& handle,
     thrust::make_counting_iterator<size_t>(0),
     thrust::make_counting_iterator<size_t>((level - 1) / 2),
     [&handle, &dendrogram, &local_vertex_ids_v, &d_partition, local_num_verts](size_t l) {
-      cugraph::relabel<vertex_t, false>(
+      cugraph::relabel<vertex_t, multi_gpu>(
         handle,
         std::tuple<vertex_t const*, vertex_t const*>(dendrogram.get_level_ptr_nocheck(2 * l + 1),
                                                      dendrogram.get_level_ptr_nocheck(2 * l + 2)),