message: test: Add missing sync_blocks
diff: @@ -93,6 +93,7 @@ class NotificationsTest(BitcoinTestFramework):
  self.nodes[0].sethdseed(seed=self.nodes[1].dumpprivkey(keyhash_to_p2pkh(hex_str_to_bytes(self.nodes[1].getwalletinfo()['hdseedid'])[::-1])))
  self.nodes[0].rescanblockchain()
  self.nodes[0].generatetoaddress(100, ADDRESS_BCRT1_UNSPENDABLE)
  + self.sync_blocks()
  # Generate transaction on node 0, sync mempools, and check for
  # notification on node 1.
  