[GraphBolt][Doc] Correct typo to fix rendering issue. (#7224)

python/dgl/graphbolt/impl/fused_csc_sampling_graph.py

@@ -754,7 +754,7 @@ class FusedCSCSamplingGraph(SamplingGraph):
         """Sample neighboring edges of the given nodes and return the induced
         subgraph via layer-neighbor sampling from the NeurIPS 2023 paper
         `Layer-Neighbor Sampling -- Defusing Neighborhood Explosion in GNNs
-        <https://arxiv.org/abs/2210.13339>`__
+        <https://proceedings.neurips.cc/paper_files/paper/2023/file/51f9036d5e7ae822da8f6d4adda1fb39-Paper-Conference.pdf>`__
 
         Parameters
         ----------

python/dgl/graphbolt/impl/neighbor_sampler.py

@@ -536,9 +536,9 @@ class LayerNeighborSampler(NeighborSamplerImpl):
         Specifies whether consecutive minibatches should use similar random
         variates. Results in a higher temporal access locality of sampled
         nodes and edges. Setting it to :math:`\\kappa` slows down the change in
-        the random variates proportional to :math:`\frac{1}{\\kappa}`. Implements
+        the random variates proportional to :math:`\\frac{1}{\\kappa}`. Implements
         the dependent minibatching approach in `arXiv:2310.12403
-        <https://arxiv.org/abs/2310.12403>__.
+        <https://arxiv.org/abs/2310.12403>`__.
 
     Examples
     -------