Tweak wording on logout warning

I further tweaked the wording from Tom's in the bug report to
put passphrases first since they are supposed to be the norm
(and the correct term is "recovery passphrase").

Fixes https://github.com/vector-im/riot-web/issues/8214

src/components/views/dialogs/LogoutDialog.js

@@ -138,7 +138,9 @@ export default class LogoutDialog extends React.Component {
                     // once you can restorew a backup by verifying a device
                     description={_t(
                         "When signing in again, you can access encrypted chat history by " +
-                        "restoring your key backup. You'll need your recovery key.",
+                        "restoring your key backup. You'll need your recovery passphrase " +
+                        "or, if you didn't set a recovery passphrase, your recovery key " +
+                        "(that you downloaded).",
                     )}
                     button={_t("Sign out")}
                     onFinished={this._onFinished}