correct branch name

Author: zmx721

.github/workflows/pr-preview.yaml

@@ -8,7 +8,7 @@ on:
       - synchronize
       - closed
     branches:
-      - 'main'
+      - 'master'
 
 concurrency: preview-${{ github.ref }}
 

.github/workflows/publish.yaml

@@ -3,7 +3,7 @@ name: "Render and Publish"
 on:
   push:
     branches:
-      - main
+      - master
   workflow_dispatch:
 
 # you need these permissions to publish to GitHub pages