Fix gh action deploy snapshot

Motivation:
deploy snapshot checkout to dummy branch

Modifications:
Remove ref statement

Result:
Fixed bug

Author: jchrys

.github/workflows/deploy_snapshot.yml

@@ -24,8 +24,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-        with:
-          ref: prepare-deploy
 
       - name: Set Up Java 8
         uses: actions/setup-java@v3