update ci-testing.yml (#3322)

* update ci-testing.yml

* update greetings.yml

* bring back os matrix

.github/workflows/ci-testing.yml

@@ -2,12 +2,10 @@ name: CI CPU testing
 
 on:  # https://help.github.com/en/actions/reference/events-that-trigger-workflows
   push:
-    branches: [ master ]
+    branches: [ master, develop ]
   pull_request:
     # The branches below must be a subset of the branches above
-    branches: [ master ]
-  schedule:
-    - cron: '0 0 * * *'  # Runs at 00:00 UTC every day
+    branches: [ master, develop ]
 
 jobs:
   cpu-tests: