message: docs: Correct description for getblockstats's txs field
  It does count the coinbase transaction.
  Refs
  Github-Pull:
  Rebased-From:
diff: @@ -1716,7 +1716,7 @@ static UniValue getblockstats(const JSONRPCRequest& request)
  {RPCResult::Type::NUM, "total_size", "Total size of all non-coinbase transactions"},
  {RPCResult::Type::NUM, "total_weight", "Total weight of all non-coinbase transactions divided by segwit scale factor (4)"},
  {RPCResult::Type::NUM, "totalfee", "The fee total"},
  - {RPCResult::Type::NUM, "txs", "The number of transactions (excluding coinbase)"},
  + {RPCResult::Type::NUM, "txs", "The number of transactions (including coinbase)"},
  {RPCResult::Type::NUM, "utxo_increase", "The increase/decrease in the number of unspent outputs"},
  {RPCResult::Type::NUM, "utxo_size_inc", "The increase/decrease in size for the utxo index (not discounting op_return and similar)"},
  }},
  