fix: updated the workflow to build and push CI runner docker image on schedule (#29361)

.github/workflows/publish-ci-docker-image.yml

@@ -1,6 +1,10 @@
 name: Push CI Runner Docker Image
 
-on: workflow_dispatch
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: "0 1 * * 3"
+
 jobs:
   push:
     runs-on: ubuntu-20.04