doc: add {import,list}descriptors to list of descriptor RPCs

Author: theStack

doc/descriptors.md

@@ -11,13 +11,16 @@ Supporting RPCs are:
   addresses.
 - `listunspent` outputs a specialized descriptor for the reported unspent outputs.
 - `getaddressinfo` outputs a descriptor for solvable addresses (since v0.18).
-- `importmulti` takes as input descriptors to import into the wallet
+- `importmulti` takes as input descriptors to import into a legacy wallet
   (since v0.18).
 - `generatetodescriptor` takes as input a descriptor and generates coins to it
   (`regtest` only, since v0.19).
 - `utxoupdatepsbt` takes as input descriptors to add information to the psbt
   (since v0.19).
-- `createmultisig` and `addmultisigaddress` return descriptors as well (since v0.20)
+- `createmultisig` and `addmultisigaddress` return descriptors as well (since v0.20).
+- `importdescriptors` takes as input descriptors to import into a descriptor wallet
+  (since v0.21).
+- `listdescriptors` outputs descriptors imported into a descriptor wallet (since v22).
 
 This document describes the language. For the specifics on usage, see the RPC
 documentation for the functions mentioned above.