CI: run PIC32MZ simulator test on ready_for_review

The draft guard skips the job on draft PRs, but the pull_request
trigger used the default types (no ready_for_review), so marking a
draft ready did not re-run the job and it stayed skipped. Add the
standard types, matching the other workflows, so it re-runs when the
PR becomes ready.

.github/workflows/pic32mz-sim.yml

@@ -5,6 +5,7 @@ on:
   push:
     branches: [ 'master', 'main', 'release/**' ]
   pull_request:
+    types: [opened, synchronize, reopened, ready_for_review]
     branches: [ '*' ]
   # Weekend cron and manual workflow_dispatch refresh the shared ghcr build
   # cache that PR runs read (cache-to below is gated to those two events).