This is just to trigger the GitHub scheduled actions registration

It is needed for #22314 and I will revert it right away afterwards.

Sorry for the trouble.

See the answer in https://stackoverflow.com/questions/59560214/github-action-works-on-push-but-not-scheduled

.github/workflows/php.yml

@@ -0,0 +1,17 @@
+name: PHP Composer
+
+on:
+  schedule:
+    - cron: '*/5 * * * *'
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Validate composer.json and composer.lock
+      run: composer validate
+