doc: Fix typo in importdescriptors

Backport of bitcoin#25276

Fixes typo 'desccriptor' -> 'descriptor' in documentation example
and updates label to be more descriptive ('my bech32 wallet')

Author: MacroFake

src/wallet/rpc/backup.cpp

@@ -1837,8 +1837,8 @@ RPCHelpMan importdescriptors() {
                 },
                 RPCExamples{
                     HelpExampleCli("importdescriptors", "'[{ \"desc\": \"<my descriptor>\", \"timestamp\":1455191478, \"internal\": true }, "
-                                          "{ \"desc\": \"<my desccriptor 2>\", \"label\": \"example 2\", \"timestamp\": 1455191480 }]'") +
-                    HelpExampleCli("importdescriptors", "'[{ \"desc\": \"<my descriptor>\", \"timestamp\":1455191478, \"active\": true, \"range\": [0,100], \"label\": \"<my wallet>\" }]'")
+                                          "{ \"desc\": \"<my descriptor 2>\", \"label\": \"example 2\", \"timestamp\": 1455191480 }]'") +
+                    HelpExampleCli("importdescriptors", "'[{ \"desc\": \"<my descriptor>\", \"timestamp\":1455191478, \"active\": true, \"range\": [0,100], \"label\": \"<my bech32 wallet>\" }]'")
                 },
         [&](const RPCHelpMan& self, const JSONRPCRequest& main_request) -> UniValue
 {