ci: dont run tests on branch

https://github.com/frappe/frappe/commit/6dda420176656a1f233f8e773b74f72a72fd4978
diff --git a/.github/workflows/server-tests-mariadb.yml b/.github/workflows/server-tests-mariadb.yml
index 9b4db49..2ce1125 100644
--- a/.github/workflows/server-tests-mariadb.yml
+++ b/.github/workflows/server-tests-mariadb.yml
@@ -7,11 +7,9 @@
       - '**.css'
       - '**.md'
       - '**.html'
-  push:
-    branches: [ develop ]
-    paths-ignore:
-      - '**.js'
-      - '**.md'
+  schedule:
+    # Run everday at midnight UTC / 5:30 IST
+    - cron: "0 0 * * *"
   workflow_dispatch:
     inputs:
       user: