Update docker-publish.yml

Make the Docker Publish GitHub action run once a week.

Author: aannenko

.github/workflows/docker-publish.yml

@@ -7,7 +7,7 @@ name: Docker
 
 on:
   schedule:
-    - cron: "25 1 * * *"
+    - cron: "25 1 * * 0"
   push:
     branches: ["master"]
     # Publish semver tags as releases.