test: repair broken test of upgrade

There was a bug in the part of the test that was attempting to run a
bunch of scenarios across the upgrade. Rather than resuming each run
after the upgrade, it was running the whole scenario from scratch
after the upgrade.

packages/zoe/test/swingsetTests/zoe/test-zoe-upgrade.js

@@ -216,6 +216,6 @@ test('zoe vat upgrade trauma', async t => {
   // Verify completion of each paused flow.
   for (const { result, remainingSteps } of pausedFlows) {
     const [beforeStepName] = remainingSteps[0];
-    await doSteps(`resumed-${beforeStepName}`, flow, result);
+    await doSteps(`resumed-${beforeStepName}`, remainingSteps, result);
   }
 });