fixup! feat(vow): abandoned errors are retriable

packages/internal/src/upgrade-api.js

@@ -54,6 +54,12 @@ harden(isUpgradeDisconnection);
  * Returns whether a reason is a 'vat terminated' error generated when an object
  * is abandoned by a vat during an upgrade.
  *
+ * Normally we do not want to rely on the `message` of an error object, but this
+ * is a pragmatic solution to the current state of vat upgrade errors. In the
+ * future we'd prefer having an error with a cause referencing a disconnection
+ * object like for promise rejections. See
+ * https://github.com/Agoric/agoric-sdk/issues/9582
+ *
  * @param {any} reason
  * @returns {reason is Error}
  */