Update preview.yml

.github/workflows/preview.yml

@@ -3,7 +3,7 @@ name: Build and deploy preview
 on:
   push:
     branches:
-      - dev
+      - main
       - dev-gh
 
 env:
@@ -43,4 +43,4 @@ jobs:
           server: ${{ secrets.PREVIEW_HOST }}
           username: ${{ secrets.PREVIEW_USER }}
           password: ${{ secrets.PREVIEW_PASSWORD }}
-          local-dir: ./demo/
\ No newline at end of file
+          local-dir: ./demo/