add another sample workflow

Signed-off-by: William Woodruff <[email protected]>

Author: woodruffw

tests/sample-workflows/homebrew-core-automerge-triggers.yml

@@ -0,0 +1,22 @@
+# https://github.com/Homebrew/homebrew-core/blob/ac74cb3f7dbdb2da2200886d5e740de124bab861/.github/workflows/automerge-triggers.yml
+name: Trigger automerge
+
+on:
+  pull_request_review:
+    types:
+      - submitted
+  pull_request_target:
+    types:
+      - unlabeled
+      - ready_for_review
+
+jobs:
+  check:
+    if: >
+      github.repository_owner == 'Homebrew' &&
+      ((github.event_name == 'pull_request_review' && github.event.review.state == 'approved') ||
+       (github.event_name == 'pull_request_target' &&
+       (github.event.action == 'ready_for_review' || github.event.label.name == 'automerge-skip')))
+    runs-on: ubuntu-latest
+    steps:
+      - run: true # This suffices to trigger `automerge.yml`.