branch name re-name

Author: cbschuld

.github/workflows/docker-workflow.yml

@@ -3,10 +3,10 @@ name: Build Layer ZIP
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
     branches:
-      - master
+      - main
   #schedule:
     #- cron: '0 0 * * *'