chore(ci): use different branch to test release (#390)

* chore(ci): use different branch to test release

* chore: process release on main_test branch

* chore: revert release.config.json

Author: eunjae-lee

.github/workflows/process-release.yml

@@ -15,6 +15,7 @@ jobs:
         with:
           fetch-depth: 0
           token: ${{ secrets.TOKEN_RELEASE_BOT }}
+          ref: main_test
 
       - name: Setup
         id: setup