TRIAL ONLY: temp push trigger for helloworld SPM workflow

Revert before opening the PR. Enables a branch trial run because a new
workflow_dispatch workflow is not dispatchable until it is on the
default branch.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: chrfalch

.github/workflows/test-ios-spm-helloworld.yml

@@ -17,6 +17,12 @@ on:
   schedule:
     # Nightly at 07:00 UTC (low-traffic hour).
     - cron: '0 7 * * *'
+  # TEMPORARY (trial only — revert before opening the PR): lets this brand-new
+  # workflow run on pushes to the trial branch, since workflow_dispatch is not
+  # dispatchable until the workflow lands on the default branch.
+  push:
+    branches:
+      - chrfalch/add-e2e-tests-for-swiftpm
 
 jobs:
   prebuild_apple_dependencies: