Change dependabot docker update check interval to monthly

Weekly updates are excessive

Author: appgurueu

.github/dependabot.yml

@@ -4,7 +4,7 @@ updates:
   - package-ecosystem: "docker"
     directory: "/"
     schedule:
-      interval: "weekly"
+      interval: "monthly"
 
   - package-ecosystem: "github-actions"
     directory: "/.github/workflows/"