ci: editing a PR's text no longer cancels its running checks (#4420)

* ci: editing a PR's text no longer cancels its running checks

CI, regression and Windows render re-run on pull_request edited (for base changes) with cancel-in-progress, so a body or title edit cancelled the running checks and the fail-closed Test aggregator went red on the cancelled run. Only a push or a base change cancels now; a text edit queues behind the running run.

* test(ci): read the workflows folder by path, not as a module URL

Fallow treated new URL('../.github/workflows/', import.meta.url) as an unresolvable import. Use import.meta.dirname and join, as scripts/check-skill-mirror.mjs does.

.github/workflows/ci.yml

@@ -30,7 +30,8 @@ on:
 
 concurrency:
   group: ci-${{ github.ref }}
-  cancel-in-progress: true
+  # A body or title edit queues behind running checks instead of cancelling them.
+  cancel-in-progress: ${{ github.event.action != 'edited' || github.event.changes.base != null }}
 
 jobs:
   test-reachability:

.github/workflows/regression.yml

@@ -13,7 +13,8 @@ env:
 # SHA. Keep only the newest expensive regression run for each PR/ref.
 concurrency:
   group: regression-${{ github.event.pull_request.number || github.ref }}
-  cancel-in-progress: true
+  # A body or title edit queues behind running checks instead of cancelling them.
+  cancel-in-progress: ${{ github.event.action != 'edited' || github.event.changes.base != null }}
 
 on:
   workflow_dispatch:

.github/workflows/windows-render.yml

@@ -34,7 +34,8 @@ on:
 
 concurrency:
   group: windows-render-${{ github.ref }}
-  cancel-in-progress: true
+  # A body or title edit queues behind running checks instead of cancelling them.
+  cancel-in-progress: ${{ github.event.action != 'edited' || github.event.changes.base != null }}
 
 jobs:
   changes: