Update docs

Docs/XXMessengerClient.md

@@ -142,7 +142,7 @@ let result = try messenger.restoreBackup(
   backupPassphrase: "backup-passphrase"
 )
 
-// handle restore result
+// handle restoration result
 ```
 
 If no error was thrown during restoration, the `Messenger` is already loaded, started, connected, and logged in.
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