[Misc] fix typo in block manager (vllm-project#4453)

vllm/core/block_manager_v1.py

@@ -391,7 +391,7 @@ def append_slots(
                 block_table.append(block_table[len(block_table) %
                                                self.block_sliding_window])
             else:
-                # The sequence has a new logical block.
+                # The sequence hash a new logical block.
                 # Allocate a new physical block.
                 new_block = self._allocate_last_physical_block(seq)
                 block_table.append(new_block)