testing for first round of scheduled builds: also notify Slack on success

Author: voj

.github/workflows/python-run-tests.yml

@@ -175,7 +175,7 @@ jobs:
       #----------------------------------------------        
       - name: Post a Slack message if build failed
         uses: slackapi/[email protected]
-        if: failure() && github.event_name == 'schedule' 
+        if: (success() || failure()) && github.event_name == 'schedule' 
         with:
           webhook: ${{ secrets.SCHEDULED_GITHUB_SLACK_WEBHOOK }}
           webhook-type: incoming-webhook