[GraphBolt] Fix intent bug of class LayerNeighborSampler DOC (#6429)

Co-authored-by: Ubuntu <ubuntu@ip-172-31-0-133.us-west-2.compute.internal>

python/dgl/graphbolt/impl/neighbor_sampler.py

@@ -176,9 +176,9 @@ class LayerNeighborSampler(NeighborSampler):
         It must be a 1D floating-point or boolean tensor, with the number
         of elements equalling the total number of edges.
     deduplicate: bool
-            Boolean indicating whether seeds between hops will be deduplicated.
-            If True, the same elements in seeds will be deleted to only one.
-            Otherwise, the same elements will be remained.
+        Boolean indicating whether seeds between hops will be deduplicated.
+        If True, the same elements in seeds will be deleted to only one.
+        Otherwise, the same elements will be remained.
 
     Examples
     -------