message: docs: Add release notes for listwalletdir RPC
diff: @@ -2,3 +2,4 @@ New RPC methods
  ------------
  - `getnodeaddresses` returns peer addresses known to this node. It may be used to connect to nodes over TCP without using the DNS seeds.
  +- `listwalletdir` returns a list of wallets in the wallet directory which is configured with `-walletdir` parameter.
  