Update prep-dev.yml

Author: bmc08gt

.github/workflows/prep-dev.yml

@@ -15,7 +15,6 @@ jobs:
         with:
           persist-credentials: false # otherwise, the token used is the GITHUB_TOKEN, instead of your personal token
           fetch-depth: 0             # otherwise, you will fail to push refs to dest repo
-          ref: code/cash
 
       - name: Generate year and month
         id: date