Update ping.yml

Author: yashksaini-coder

.github/workflows/ping.yml

@@ -13,4 +13,4 @@ jobs:
 
     steps:
       - name: Send HTTP Request
-        run: curl -X GET ${{secrets.BACKEND_URL}}
+        run: curl -X GET https://leetcode-journal.vercel.app/api/etc/supabase-activity-scheduler