Update .github/workflows/tests.yml

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

Author: norkunas

.github/workflows/tests.yml

@@ -8,8 +8,16 @@ on:
       - trying
       - staging
       - main
-    schedule:
-      - cron: '0 3 * * 1'
+on:
+  pull_request:
+  push:
+    # trying and staging branches are for BORS config
+    branches:
+      - trying
+      - staging
+      - main
+  schedule:
+    - cron: '0 3 * * 1'
 
 env:
   fail-fast: true